I think another season would help, and I say that with my NBA scout hat on, not my UConn hat.
While his stats haven't shot up, his BBIQ has. He looks comfortable out there. He's not reckless with the ball like he used to be. He knows when and when not to put the ball on the floor. And while he now errs on the side of conservatism, his shot selection has gotten quite good. (As for the OP, his release isn't all that quick, but neither is Matt Bonner's.)
But he has room to improve. His post-up game is nice and there's no reason he can't add more moves to the ones he already has. He could use a mid-range jumper -- maybe a pull-up J. And while he'll never be Ricky Rubio, his dribbling can get better; it already has improved a lot since his freshman year and I bet he hasn't maxed out in that area.
I do wonder about him in the NBA. He's a real tweener. While he can be an NBA 4 offensively, on D he'd get eaten alive (his off-ball shot-blocking is nice but I just think he'll get bodied pretty bad.) And while he's smooth enough to be a 3, I don't know if he's quick enough, especially on D. The question is whether he can develop his skills to the point that they make up for his physical limitations. But, as I said at the top, I think he needs another year to put himself in a position to succeed at the NBA.
For whatever little it's worth, I bet he'd kill it in the NBDL. That may be his path.