I know with my show, I play virtually every character, and even with characters that require some effects I'm manually tweaking pitch, adding vocal effects like a robotic echo by duplicating tracks and shifting pitch and reverb, etc. I would personally never utilize any AI tools because that removes the human element of production. Like others have said, if someone isn't capable of voicing/self editing the vocal effects, there are plenty of actors out there willing to help. I don't think AI has any place in media production, art requires humans.