It should be interested to note how Cyseal would sound with VO, seeing how walking their spams your convolong so badly, I have a hard time figuring out how it wont be annoying with VO.
Then again, it might add chatter making it feel like a proper city, Waukeen promenade in BG2-like.
I don't think generic merchant barks will be voiced. It MIGHT make it feel like a proper city for a minute or two, after that I'd probably want to take a drill to my head.
EDIT: oh, I didn't see
the Kickstarter update. hmmm.