Meh... he's pretty redundant w/ House. Not really a PG, he's an undersized 2. Either he or House will be giving up a lot of size on the defensive side, I don't see him as being much of an improvement on the defensive end. He's a gunner, just like House, just not quite as deadly a shooter. Not big enough to spell Pierce, which is the biggest thing; our backup wing really needs to be a legit SF-type, not an undersized 2-guard.
Not a bad guy to have on the bench, but doesn't fill any of the team's real needs, which as mentioned are a legit backup SF, a rotation-caliber 4th big, and maybe a real PG (ideally with some size) to back up Rondo/play anongside House.