Del Negro is done, though I'm going to keep praying that he stays until it's official.
Their ceiling is higher than what they accomplished with Del Negro, but they don't have all the right parts IMO. The lone defensive big isn't that great of a defender, and their big rotation just isn't very good. Barnes is the only quality wing defender that has anything left in the tank.
And while I would bet that CP3 stays, there have been rumblings about friction between him and their younger guys. Even when they're good, the Clippers are dysfunctional.
