Huge signing
We have not one but TWO guys that can guard D-Howard one on one; an interior force that still commands a double-team that leads to open shots for guys like Ray, Paul, & other shooters, does not guard the pick & roll well but his benefits definitely out weigh the cost. + Who on Miami will be able to stop him? With 20-25mpg, he will do damage to opposing teams.
Sounds like a deal to me!