I posted my own feedback thread and my dissapointment about the evil playthrough aswell, with exactly the same criticism.
I know ... we are talking even there.

There is no incentive to side witht the goblins, the player is informed about this possibility too late.
I just cant agree less ...
You find out in exactly the perfect time you need to know ... unless you attacked Dror Ragzlin and Gut allready.

But if you talk to them, fiding what they can offer you, exactly as the evil character should have ... you find out about this possibility in best moment, meaning exactly the moment you created it.
True, its not like Minthara have posters of uncle Ragzlin in top hat telling: "I want YOU to plunger druid groove we even dont know about yet!" ...
Question here is: Do you even need them?
After all, you are the one who brings them information about that groove (or Sazza, but you bring Sazza, so it counts the same) ... as reward you are invited to this raid ... and you dont even need to participate.
I see you are a bit confused with the fact that goblins were attacking the gate ... but they was just following those humans, nothing more to see here.

It was barely scout patrol, or pursuing group ... certainly not siege, and certainly not raid.

If you see the rest of map, you find out there are two little towns, both raided and plundered by goblins (and one raided by Gnolls) ... meaning goblins obviously wish to take whole coast for themselves. And you just pointed to next target.

Personaly i more wonder if you can conceal the groove location ...
That would be interesting.
Nothing is explained about the brand.
Im not sure what is there to explain ...
How about telling us about the existence of powerful absolute artifacts before we can brand ourselves?
Its writen right there in description ...
https://baldursgate3.wiki.fextralife.com/Gloves+of+Power"Blessed by the Priestess Gut, these gauntlets aid any who bear the Absolute's mark upon their flesh - but woe any non-believer who hopes to steal their power."I admit that i also didnt notice that at first ... but same as many others, it was just my own lazyness to read whole tooltip.

We should be able to have our followers branded aswell.
Well ... i agree that there should be some extremely hard persuation diceroll ...
But on the other hand, since most of them disagree with you being market, it also makes sence as it is. :-/
And it needs to show up in the character sheet so you can look it up if you open up the game again.
Cant agree more!
There is many things that should be traceable easier ... or at all. This is certainly one of them.
Now I got a similar response like yours: "Right now, it isn't worth it to play evil, but maybe it will later on."
I dont recall when i said anything like this.

Cant say its impossible ... but really dont recall. :-/
Often times, making a deal with an evil person or entity offers you exactly that. Power, fast! Authority! The ability to do things which you were otherwise unable to. Its exactly why Wyll made a pact with a Cambion (even though he only learned about it later). This is exactly what Raphael promises us. An instant cure! WIth unknown drawbacks.
True ... but lets see the crittical difference here:
God / Evil god / Cambion / Tadpole / Absolute (whatever it its) / Hag ... versus: Common goblin.

See? You compare incompareable ...
What power should Goblins give you, since they dont have even any even for themselves?

Even if you are talking about Minthara, wich is litteraly the only person in whole goblin camp that is not just "common goblin" ... what power she have to share? Does she even have some real "powers"? Or is just standing on powerfull post, that is even not big enough to anyone else?

Its just the same with Tieflings, or Druids ... you just pick a side of common mortals, and help them with their strugle ... dont search anything more behind it.

And now you look at how the evil storyline plays out: You butcher a bunch of innocents, you get worthless junk from most of them.
I dont see much difference from "good" storyline ...
You still butcher bunch of ... maybe not so innocents, but there are also woman, kids, and civilians ... and get worthless junk from most of them.
The only leaders drop something interesting: Minthara, Dror Ragzlin, and Gut ... anything else, is just junk as you say ... copmared to raid on groove, where you get magical items from: Zevlor, Kagha, Arabela's mother (dont remember the name) ...
So where exactly is difference?

The goblin leaders and Mintharra have much stronger magical items but they do not reward you at all with these items, even though they would have been unable to raid the grove without you.
I dont see any reason why should they ... its their items, your sucess or even survival is not crittical for this raid.
As i said, you dont even need to participate.

Did you give Minthara anything to make sure she will be sucesfull?

So why you expect her to do the same?
So you get nothing of value, and in the end they even turn against you.
Its in their nature ...
We dont know for sure what is the reason for this ...
But i presume, since Minthara send those tree siblings to search for crash survivors, and kill them ... that she either dont want any competition, and hoped that you will be killed during the raid ... or your tadpole is somehow different, since everyone in goblin camp (read as: everyone who didnt get tadpole on this particular Nautiloid) seem to be unaware that they have parasite in their heads, and therefore you are potential threat to Absolute and "she" wants to kill you.
Wich kinda is even more reason to not give you any weapon ...
You have to understand in this scenario, you are not knight in shiny armor they was hoping and waiting for this whole time ... you are convenient asset that will be used, and get rid off the second you lost your usefullness.

This is the exact opposite of what I expect from an evil playthrough.
Then you probably have bad expectations.

You seem to be used from other games, to see yourself as alfa predator, on top of food chain ... but so far you are tiny shrimp, that is trying to survive in the sea full of sharks.

First you need to get there.

I was expecting powerful items, slaves, servants at my camp.
Well ...
Kinda big expectations for first few hours of gameplay ... i would expect those things much close to the end.
But i can relate ... partialy.

I would totally love (as i allready told here, multiple times) to have option to either knock out Tieflings, or have civilians cornered somewhere ... and then have some dialog with Minthara about "what will we do with them" ... personaly i imagine options like:
- Sacrifice them to the Absolute
- Let goblins kill (and possibly eat) them
- Sell them as slaves to Underdark
- Persuation (easy/medium) - Set them free, then send goblins after them
- Persuation (hard) - Set them free, so they can tell the world about power of the Absolute
Since I raided the grove I have 6 dead bodies laying around in my camp aswell as an Altar to the absolute which just sits there and does nothing.
True ... and if you kill goblin leaders, you have there one Elf that is repeating the same sentences, and second one dead on beach.
I dont see much difference once aggain.

The best rewards by far are from the dream sequences, the powers of the Absolute/Illithid powers. You can pick up another one in the Underdark after an interaction with your Tadpole. I would have expected similar rewards like this by siding with the Goblins.
That i allready comented.
