I'm a HUGE Poythress fan but it struck me, watching those clips, that I haven't seen him handle the ball like that since his freshmen year. Just appears, to me at least, to have lost a lot of confidence when it comes to shooting and ball-handling.
These things will either improve or they won't and I don't think they are what is necessary for UK to be successful next year. Poythress just MUST play to his strenghts next year. Defend, rebound, get put-backs/dunks. Pretty much just be the physical specimen that he is and have those one or two special plays that only he can make during close games.