I would say Rebraca has improved the most. And the improvement is mainly in he has dialed up his aggressiveness. Kris is skilled and he now needs to dial up his aggressiveness to be great. Too late for college, but maybe in the pros.
Ulis has improved some but has a long way to go and is inconsistent. Same could be said for Perkins.
I like Sanfort's hustle and he just needs to settle in and be consistent.