Why are we still having this conversation? The kid made himself a good NBA player.
This is a bright spot in an otherwise dreadful season.
Being a good on-ball defender and nothing else is far from being a "Good NBA Player"
hes been consistently hitting jumpers and making good plays on the offensive end the last few games. Oh and his dunk over kd made the nba top 10 
Im sorry but his offense is terrible. Teams give him the Rondo treatment and allow him those wide open looks that he can't be trusted to make...and even worse if his inability to run a fast break. His assist-to-turnover ratio is awful
Meh... he's been hitting those shots at a much better clip recently. 55% from the floor this month, FWIW. His shot looks a lot more confident. Certainly, he isn't a finished product on the offensive end, but he seems to be improving, and I've no reason to believe he can't keep getting better.
I don't think he'll ever be a point guard, but since he can defend shooting guards (despite being undersized) he should project out to being a 2. Most of his weaknesses seem to be things that are more point-guard duties (ballhandling, getting the offense set up); I would certainly hope they ultimately bring in another legit backup 1 and just let AB play off the ball.
The kid *just* turned 21, is proving to be a significantly above-average defender, and he's looking more comfortable shooting the ball; I'm happy with where he's at.