Love Boogie and feel like he's definitely headed in the right direction. The only thing that held him back last year is his conditioning. Sac was my league pass team so I watched quite a bit of them last year, and his "immaturity" is completely overblown. That being said, he is a hard player to officiate, and he does get fouled a lot more than the refs acknowledge.
It just looks like he can improve on his conditioning / motor. If he could do that, he would be even more spectacular than he is now. Too many times in games where he'll have an offensive possession, play extremely hard, get position and all of that, miss the shot, and shake his head and start walking up the floor instead of running. Sure he may have thought he was fouled, but from looking at film, it just looks like he gets tired and uses the refs as an outlet for his lack of conditioning. He also starts to make some terrible decisions when he gets fatigued as well.