I know a lot of people don't like The Godfather Part III, I am ready for downvoted. But I must say, I really like the finale.
I think it's a really different movie compared to the first two, there was still mafia intrigue and fighting and revenge in the movie, but it's much less about these things. It's a movie about Michael himself, a movie about even he may be the most powerful man in the underworld, he is still a human. He is desperate for love, he wants family, he is lonely, but he had to push everyone away for "family".
I think I like the movies about how heroes(in this case, villains) are still humans. For example, my favorite Bond movies are "Casino Royale" and "On Her Majesty's Secret Service", in which Bond is a "human".
And that's why I love The Godfather Part III. It showed how vulnerable and lonely Michael is, it showed how he regrets for the decisions. And in spite of all the effort he tried to make it up with his childs and Kay, he is destined to be lonely. I love the original version of the ending, the camera zoomed out, the chair fell, and nobody was there for him(And that's also the reason why I don't like the new version as much because it ruined the trilogy that has the same opening and ending). Words fail me.
And this is the part that I think is better than the first two. I know Michael showed his feelings in the first two movies sometimes, but it rarely happened. He had to be ruthless and brutal and emotionless for his "family". But he didn't want to, he never wanted to. He had to hide his feelings for everything, including love. It feels like he's a robot dead inside in the first two movies, but in Part III, he finally became a human.
The best part is when he made his confession to the Pope, he cried, he was helpless, he regretted everything, he regretted being Don Corleone. He may be a ruthless Godfather, but deep in his heart, all he wants is love.