A miscast, are you serious?? There couldn't have been a better casting than Richard Conte. He was perfect in portraying Barzini and the film wouldn't have been as good without him.
Also, Barzini was supposed to be more business like than the other dons. Puzo literaly describes him that way in the novel.
"It was between the brothers Kay -- I had nothing to do with it."
There couldn't have been a better casting than Richard Conte. He was 