He's not that good, he's undersized for the 5 spot, and guys usually land in Pop's doghouse for good reason... but there's no doubt in my mind that he would HELP, at least a little.
The question is; is he any better than Sully? That's hard to answer without seeing Sully play yet. But, if San Antonio said "we'll give you Blair for JJJ," I'd have to think long and hard about it.