I personally enjoyed EA Wyll. I thought that his moral struggle then was quite interesting and more textured than what we ultimately got. I also find his relationship with Karlach to be a little odd, to be honest. After the quest is said and done, we never really get to explore their relationship, even though they supposedly became very good friends. I would have liked to see them develop from animosity to the more complex after-revelation feelings, and finally BFFs.
After some thought, I think BG3 would really benefit, as some said, from some NPCs being mandatory. They are much more tied to the main plot than the companions in D:OS2 were, and trying to write around their supposed abscence makes their storyline weaker. I don't think it's worth it.