Just Me, I don't quite agree with you that Copolla screwed up with the characters. I think he was able to put that shock element to each of the characters... Kay aborting a child, Michael killing Fredo, pentangeli suicide, michael trusting Tom earlier and distrusting him towards the end etc. Ofcourse each author will change the story as per his taste, but the question is, did it look unnatural or was it not sufficiently justified?
