When you can move well you get more fouls. That is why the Brons, Wade, and Kobe's of the league shoot more. Shaq WAS one of those players but since he can no longer move like he use to he is not going to get to the line. It is the same reason why he is getting smacked around Yao in games like this. You know he was up for the game, his ego to be the greatest center next to Bill Russell but he just can't do it physically anymore.
Do you believe he will still be around by next season and be effective? He's already missed 2 games due to injury and has posted pretty weak numbers against formiable opponents like Ben Wallace and Yao Ming.