PJ was WAAAAYYY more athletic and had LOOOONNNGG arms which allowed him to play bigger than he actually was. Keon is SLLLOOOWWW, has HORRIBLE footwork and can't defend ANYWHERE on the floor. He's a decent shooter but is loose with the ball, a bad passer and not strong enough to score in the paint consistently.
He was the 2nd worst player on the floor after Askew today. He was supposed to be the leader of this team, yet he can't even play well enough to be a solid 6th man. He needs to work on his strength and overall game for at least another year but actually needs 2.