After my Sorcerer playthrough i feel like there are a lot of issues that were not there before, mostly graphic ones but also quest and conversation bugs.
i.e.:
after taking sides and killing Nere the rest of the duergar attack me even though i sided with them.
After refusing to kill Spaw for glut, the fight begins and the whole myconid colony is agressive.
There is more but since i did not play for a while, i am not sure if its new or it just did not occur on previous playthroughs...