Give all of the bullshit that we have to AI. Allow them to throw oil /acid barrels into fire right next to you, let them separate your party with teleports, teach high-level Leadership to their leader types (Alexandar, Dallis, the rest of the named magisters come to mind), that kind of thing. Specific enemies already use bombs and it's a step in the right direction.
AI in general needs a tune-up, but Larian are already working on it.
Oooooo, this sounds tasty! All great suggestions!