Heat sign Stackhouse

Mike Miller hurt his thumb guarding James in practice.  Thus, the Heat signed Stackhouse.  I get it...but I don't.  Miller is a shooter, Stackhouse is a slasher.  The Heat already has 932 guys who can slash to the basket.  Pretty stupid signing, especially since he was in the same graduating class as Bea Arthur.  There are plenty of spot up shooters with fresh legs that could have fit in nicely until Miller returned.