I think Powe, Perkins, and Davis have topped out talent-wise…they might get more consistent but they won’t show off any “new” skills.
I disagree. It's hard for me to say that BBD has reached his ceiling after a very inconsistent rookie year. I think as he gets into better shape, his athleticism will improve, making him better on both ends of the court. I also don't think BBD has scratched the surface with his passing skills, and has yet to show case his jumper, which he featured in the NCAA.
I'd go with Davis as having the most ability to make a big improvement from last year, not only in the above areas, but certainly with his consistency. This year, I expect more steady performances, rather than the constant ups-and-downs of last year.
I also expect to see some good things out of Pruitt. I don't think he'll have a huge role, but he should be a guy who can occasionally get the ball to the rim off the bench.
I think you'll see Powe and Perk try to improve their offensive games. Both have demonstrated range on their jumpers, Powe in college and Perk in practice. Also, Powe definitely could improve on the defensive end, in terms of proper rotations, etc.
With the rookies, I don't expect a whole lot. O'Bryant... Well, if he adds more of a contribution than Pollard did last season, I'll be impressed.