Well, Collins is hardly a stud, so I wouldn't rule the Hawks out yet because Collins is "blocking" Shaq from joining.
Still, if Danny doesn't plan on upgrading the 2/3 anymore, Shaq is looking more and more like a good idea. Simply put, we need enough firepower on the bench so that Doc can rest Paul and Ray for more than 10 mpg each (ideally something closer to 15+ mpg). I don't see Wafer/Daniels/Bradley doing that for us.
However, if you bring Shaq into the equation, it changes things. Throw him in the post and all of the sudden Von Wafer doesn't need to create his own shot, because he'll be getting better looks with Shaq in the post.