C3PX said:
Having different actors for many of the characters was just fine for me, when I listen to it I like to try to forget about the movie as much as possible and imagine everything in my head. May sound strange, but when I listen to this, the characters in my imagination are based off of the Ralph McQuarrie paintings rather than the actors from the films.

I agree. The different actors don't bother me at all. There isn't any mental conflict for me when I'm listening to it. Truthfully, Leia & Han have replaced the film versions for me. Much deeper characters now.