Is he going to help enough to get them over the hump if he helps at all?
At this point he would be an excellent back up if his health holds up.
Honestly, WOW, he should retire. While he can play still, I just don't think the ramifications of his playing is something a team should burden itself with. The real possibility of his agrivating his condition exists, so it does not make fiscal sense either.
But could he help the Heat? Certainly, just at what cost.