I second The mind flayer transformation
It felt forced, like "the writers must think of some great sacrifice in this particular moment, although they didn't really built it". I lost my motivation to finish the game after this. Good that it was the final-final, because I didn't feel like playing anymore after this. As a person who doesn't like to make NPCs suffer, I felt forced to sacrifice my own character.
Astarion
I'd love to have back his old background in the game (corrupted magistrate who was selling criminals to vampires until he tried to cheat Cazador and got turned into his spawn). It would make him less one-dimetional victim. As for stuff that are rather impossible anymore: I want his personality from early access back and his old version of realtionship with Cazador (personal slave, not just one of other spawns that are "family").
Cazador
I want back his cut questline. The very idea of doing quests for him, getting more context about Astarion's situation and seeing how such situation would work with Astarion in the party at all.
Also, I would like them to make Cazador more diginified and clever. Right now he is more pathetic than terrifying.
And overall, I know this is absolutely impossible at this point, but I'd like to see this game in a form they planned about 3 years ago. The infos we've got from the cut content looks like they had rather interesting, consistent structure, but suddenly some bulldozer destroyed the big part of it.
The "Down the river" song that was refering to the Daisy situation, Raphael's offer to get rid of the tadpole, old, not-so-nice companions and so on.
