One of the main problems which I feel is the downfall of the movie is the fact that Robert Di Nero isn't in the movie as much as he should be. I know that this movie is supposed to to show the almost downfall of Michael and the rise of Vito but it doesn't demonstrate Vito as good as it should have. It merely glimpses over Vito and doesn't properly show him as he rises to the big time mob boss he was in the first movie.