You know what I can't imagine?
Having the physical tools and basic skills to be drafted in the 1st round, be given a chance to play for the Boston Celtics, and then not totally busting your butt this offseason to prove beyond a shadow of a doubt that you belong.
Just imagine having a chance where the only thing stopping you is work habits and effort?
My goodness, what an opportunity this young guy has...
Well, the problem is kinda what you just said - his skills are just basic at this point. He can do a little bit of everything, but nothing at a high level. He can shoot a little bit, but not good enough. He can dribble alright, but not good enough. He can defend alright, but not good enough. It's hard to improve a bunch of facets at once, so I'd say he should focus on one thing this summer - his defense - and make that the reason that he gets a rotation spot on the team. He'll get points as a garbage man - he moves well off the ball and he's an excellent rebounder. But he needs to be able to defend to take anybody's spot in the rotation this year. He has the potential to be able to defend well at three positions, and it would be stupid not to take advantage of that. Once he has his spot in the rotation, he can worry about being a more important piece of the offense.
In other words, I agree with you. He needs to work his tail off this summer.