My theory: They didn't meet Robert Duvall's demand, so, no Tom Hagen. Pacino was upset about that, and mailed in his performance. I mean he wasn't even trying to be Michael, and that alone about ruined it. I actually think the Vatican involvement was a good idea, just poorly acted and probably a poor final draft that Coppola and Puzo would have given more attention to if the environment surrounding production wasn't so disgruntled. Also, Sophia Coppola might be the worst actor ever, although she's a good director. Lost in Translation is good stuff.