You better bet Shaq is excited about this trade.
Anybody who says Shaq doesn't have a helluva lot left hasn't watched the Heat this season. I watched the Heat a lot, and if I was a Heat fan (before the trade, and still), I was a lot more concerned about Dwayne Wade than Shaquille O'neal. The Heat certainly have fallen off considerably in the past month or so, but in the beginning of the season - right around the time Wade came back - the Heat seemed to be catching their stride. They were really close in a lot of games. But Wade hasn't been the same this season. He's leading the league in TO's by a large margin, and he has been especially poor in late-game situations.
If you want to know what Shaq is going to do for the Suns, watching some clips from this season when Penny Hardaway was still on the Heat. I know this sounds silly, but Penny knew how to get Shaq the basketball, and when Penny was being assertive, it was honestly laughable how easy it was for Shaq to score. Let me repeat, so there's no confusion: I'm talking about 93 year old Anfernee Hardaway, the guy that makes John McCain look young. He would catch the ball on the wing, not even take one dribble, throw the ball over the fronting defender, and Shaq would lay the ball up (or get fouled). It was incredibly easy. Sometimes, it didn't even seem like basketball.
Unfortunately, the Heat chose to surround Shaq with erratic, unintelligent players like Ricky Davis, Dorrel Wright, Daquen Cook, and Dwayne Wade. I'm not sure if they didn't know how to give Shaq the basketball, or if they downright didn't want to, but for whatever reason, they never did.
One thing you need to realize is that Shaq is shooting a career high in Field Goal percentage. Of course, this has a lot to do with the Heat relying on Shaq for a lot less, and thus he does not have to take a lot of the jump hooks and fadeaway... um I guess I'll call them jumpshots(?)... but it at least must let you know that, if you can get him the ball where he needs/wants it, he can still be extremely effective. Now, I don't pretend to be able to see the future, but I've always known Steve Nash to be a good passer. He's sorta good at getting his surrounding players the basketball where they want it, right?
Oh, and who's going to guard Amare??? Think about this: if you were an NBA head coach, would you want to play the Phoenix Suns? You can't double team Shaq, Amare, and Nash (actually, the Spurs could do that, but only if you count one of the referees as a Spurs player).