I have no idea what were you trying to say with those Minotaurs.
But i like the rest of your post, so +1 i gues.
Larian has altered the balance of the rules by changing the Sorcerers metamagic quicken spell to 3 sorcerer points instead of 2. For whatever reason they decided to make that feature harder.
I believe this one should be easy to explain ...
Since Larian so far didnt expressed any effort, nor plan to restrict number of leveled spells casted within a single turn ... BUT they obviously understand that this option is OP as f**k!!!
They probably decided to icerase this cost not as "making feature harder" but as "making feature a LITTLE more ballanced" ...
Yes, our sorcerer is still able to cast 2 Shatters per single Turn ... wich s/he should not.
But also he is no longer able to do that twice within first two rounds ... wich s/he would be able to, if cost remained the same.
The important question here is, if that is just placeholder until casting restriction will be implemented ... or if this is final version, but i guess time will tell, since Larian will not.
Except exact oposite:
Just this allone ...
If you have only 10 monsters prepared ... to "set standard stats" it would mean to check, compare and rewrite every single stat value that monster have ... that would mean at least 70 entries ...
Analogicaly if you have 100 >> 700 entries.
Then, when this work would be done ... you keep demanding futher:
Imps = Resistance. Add sting attack.
Intellect devourers = Resistance. Add Devour Intellect attack.
Phase Spiders (not Matriarch because she's a unique spider. Homebrew works fine with her) = no Misty Step and remove spitting. Give proper Ethereal Jaunt
Except sting attack ... wich is allready in game ... but on the other hand was (among resistances) specificaly mentioned by Swen as one of removed things from Tutorial, since monters were too strong for some new players.
Do you remember them talking about keeping records of that when, where and how often people die? This is the case.
Anyway, back to the "not huge changes" topic ...
The other two, both Devour Intellect and Ethereal Jaunt ... are not in the game, that would mean creating two additional spells from the scratch, its not just writing "now start using Devour Intellect" and voila
... the game must understand what is that thing suppose to do, how should the npc using it work and how should pc react on it ... that allone is quite huge change. :-/
And what would be the outcome? Litteraly two creatures that would seem "a little closer to 5e". Not sure if that is even worth it. :-/
Personaly i believe that removing poison spiting from Phase Spiders should be totally acceptable and satisfying ...
I mean what is the problem with "misty step" anyway? The whole idea of Phase spider "phasing" is dissapear on one place and then reappear on another one ... i dont see much difference here.
Just copy the same spell and name it "phasing" or something simmilar ... set spiders to teleport close to us so they can BITE in the same round instead of flying to other side of cave ... and the result should be fine enough, with hardly any cost since you allready have everything you need implemented.