I'd be very surprised if in the more accurate lore version he WASN'T a high level druid, if not an archdruis. Probably not a Great Druid, but one of the top three of the Circle? Arundel from IWD was level 14.
I honestly dont quite understand why would he "need to be high level character" ...
I mean feel free to corect me, but as far as i know Druids are not usualy society where "the strongest rule over all". :-/
Once Halsin is respected and concidered by all others in his circle as their leader, he could and should be their leader no matter what level he have. O_o
Especialy since there is nobody significantly stronger around him ...
As i said countless times in topics talking about Halsin level: In land of blind man, one-eyed is the king.

Not to even mention that level is completely "unroleplayable" stat in my honest opinion ...
Yes, it helps us to figure out how strong certain characters will be and it helps our silly realistic human brains to understand how is that possible that squishy Gnome can dare to fight a Dragon of size as average house.

But beyond that?
There is no room for such mechanic in roleplay for me, sory ... its just number and if it would be hidden (as it should be btw, since DM usualy dont tell you "you met 5lvl druid", do they? :P ) nobody would say even single word at this topic. :-/
Considering that reincarnate is a fifth level spell, a tenth level Halsin should be able to cast it, and offer it as an option with the caveat of "we have no idea what race you'll become". Lae'zel will be horrified, Wyll may not really care, dunno about Gale, Shadowheart may not care, and Astarion will be horrified that he'd lose his pretty face that he can't remember. It'd feel very weird to have initiates leading the grove, though.
For one, Wyll would definietly care, since there is nothing Wyll care more about than Wyll himself ... and his reputation ... he would hardly be able to continue as "legendary blade of frontiers" when he would become something else.

For two, Halsin is not level 10, but level 5 ... so why are we even talking about this?

If we would start "if circumstances would be different" ... then we can also change circumstances right from the start to being able to pick the "brainbug" with long sharp pointy needle through our ear.

And Kagha at one point had the title archdruid.
I was not aware of this ...
When did that happen?
why aren't more elves having absolutely allergic reactions to the drow PC or Minthara. Astarion, being a racist high elf noble git that he is, should've made a few comments, if not outright flip out. Elves, especially high elves, absolutely hate the drow that borders on obsession.
Agreed ... i was also hoping that in by Drow playthrough people would despise me and some vendors or sidequest givers would simply refuse to talk with me at all, unles i use discuise self.
It was quite dissapointing.

Not that i dont understand that Larian presume (and i think they presume corectly) that most mainstream players would be pissed of if they block out content just by picking cool race ... but for people who knows at least little of DnD (and yes i know VERY little) it is just another source of different kind of frustration.

Or why Shadowheart wanders around a Sharran temple, surrounded by broken Sharran stuff, and doesn't quite get that she's in a Sharran temple until way later. Even if what we suspect of her is true, she should at least recognize all the empty circles and black circles that are on every surface.
Yup.
Also not sure why you can be a cleric of the Dead Three. Last I checked they weren't much more than glorified mortals that don't die. Who's granting their spells?
Im not quite sure when, but i believe i have heared Wolfheart in one of his lore videos talking about some event when they reached full godhood.
Try to look there.

But for me, the "there are solutions but we will just withhold it from you for no reason" is the biggest plot hole. I want a reasonable explanation as to why having Astarion bash my PC's head in then someone bringing the character back from the dead isn't a viable option, and I care about these things since this is an RPG. Bioware and Obsidian would've addressed the issue.
I mean ... i would not mind mentioning the option ... probably.
But talking purely for myself, this is something that goes without telling. :-/
After all, as it was mentioned above, you and your companions can quite easily die during your adventures ... some more often than others (looking at you Gale) ... yet no tadpole even gets out ...
Now in Grymforge you can even be pushed to FREAKING LAVA and burn there ... just for the record, do you have any idea how long will human body keep intact in contact with actual lava?
I dont, (at least not exactly) ... but in general, its matter of seconds and its usualy told that "human who would jump into active vulcano would never reach the lava, since he would vaporize faster than he would fall". :-/
So ... in my honest opinion, quite thorough way to be asured that tadpole will not make it out.

Yet once we are ressurected that bastard is right there once again ...
Seems obvious to me that this trick with smashing brain with huge rock will not work as intended.

And even if it would ...
Note that all people you meet is strangers to you ... dont tell me that if someone completely unknown to you ... would offer that he would smash your brain off with a warhammer ... and then he would heal you ... you would honestly react like "hells yeah, lets do this right now!"

Mr. Bones is just offering resurrection for 200 gold, cheaper than a goddamn revivify diamond.
I dare to presume that cost is there exactly to make ressurection accesible for EA, after all Larian had no idea (at least from start) how often will we die ... and it would be terrible experience if you would not be able to get past first encounter with Intellect Devourers on beach and had no way to ressurect your party members.

In other words i hope in final release this guy will either be removed, or his cost will incerase like at least 10 times as much.
So, what if your ceremorphosis is actually complete already? If you choose to use the tadpole, or accept the lewd dreams, then you seem to assimilate more with the tadpole, which might mean that by the end of the first act you are actually ceremorphosis-ed, just in a special way that has left your body un-transformed, at least for now. Congratulations, you're an Illithid sleeper!
This sounds to me more like plot twist for endgame, than just act.

But it would be fun! :P
technically it would become your brain
Nah ...
Technicaly it become your whole body ... or even more precise, your whole body would become it.

I have seen no explanation for this and can only imangin "fate" as one. Which is pretty lazy.
Its called plot armor.

Also, when falling out of the Nautiloid, something saves our live. Maybe the tadpole? Why does this happen only once? With the actual incapacitation mechanic we could easily be transported back to camp with 1HP when dying on the road. That would make more sense when what we have now.
So there are a few small holes everywhere

I believe we get quite close to things that are never questioned in fantasy ...
Like how is that possible that i just get direct hit to unprotected head with a Stone Hammer from 200kg Minotaur ... and i just get 2Bludgeoning damage and feel totally fine.

Those are not holes of storytelling ... those are just things that work differently in games.

Our tadpoles are unique even from other true souls. Ethel and Omeluum give more insight. Omeluum tells you that the magic surrounding the tadpoles is much more powerful and unique.
I dare to believe that Omeluum was comparing our tadpole to regular (aka not-alterned by nethereese) tadpoles ... wich would mean that he didnt mean "our tadpoles", but all true soul tadpoles in general.
In other words he would probably say the same to Minthara, Ragzlin, Gut, Nere, or anyone else ... if he would ever get the change to study her "brainbug".

But I don't think the game necessarily takes those moments seriously, at least not in a narrative sense. For instance, no one ever goes on existentially about how they just died and came back from death.
In terms of the game, it's just a respawn. The narrative works around it, not through it.
And so I suspect it's not even something that gets taken into account with the Edowin scene.
In other words, I think the *flaw* in the writing isn't that the tadpole comes out when someone dies... I think the *flaw* is that the video game has a baked in conceit that allows for revivify scrolls.
I almost think we have to pretend like the party member never died, but rather was close to death's door and pulled back just in time with powerful healing magic.
Or refuse to use the revivify scrolls, which is basically what I do.
It would make sence ...
But sadly both Gale mentioned that you litteraly "get him back from the dead" ... and Mol litteraly mentioned that she want the Druids idol "to sell it and maybe get enough money to pay for ressurecting Arabella". :-/
So yeah, ressurection spells are definietly part of this world and should be counted with.