The last few years his game has been dunks only, but this year in the games I've watched, he looks more comfortable going up with both hands, his footwork looks better, and he has better touch around the basket.
Well, he is too old to carry a team, but a good TEAM (Lebron Cleveland James was not a team) that can utilize what still left can definitely carry Shaq around. He is still a very serviceable center if only for his size alone, not to mention his experience. I can only imagine how much it sucks for a player like Shaq to play in a system where he can't just use what he has instead of fighting for crumbles that fall of the playbook. This is why I thought he chose wise deciding to sign with the Celtics - They know how to utilize players and they have the need for his leftover skills.