I think KO is gone this offseason either in a draft day trade to move up or in a sign and trade deal for Tobias Harris. KO is just bad on D, isn't very tenacious with his rebounding (he kinda just waits around), and if he loses his confidence his offense is absolutely gone.
I doubt we let go of KO. He's got too much potential and he's shown marked improvement on the defensive end. So far this game he's already blocked Anthony Davis. He's also being asked to play a position (Center) that he doesn't naturally play. I think we hold onto him for at least a full season of him playing Power Forward.
I think Sully has more potential than KO and Sully put up better stats than Kelly this season before both went down with injuries. Also i'm not worried too much about Sully's injury as long as it has nothing to do with his back im fine with it.
KO is just too slow to guard the 4 or 5 and I think he will only have good scoring nights on 5's because there are a lot of athletic 4's nowadays that could stay with him at the 3 point line so I don't see him doing too much even in the P and R because he's interfered with IT a couple times tonight but i'm willing to give him the rest of the season to see how comfortable he can become with it.
But I do think one of the 2 will be gone this offseason most likely around draft time and it'll be KO if he doesn't toughen up and gain confidence the rest of the season or Sully if he doesn't drop the weight by then.