NBA - Main

Stability. He's had inconsistent training/coaching, different teammates and coaches almost every year, his roles changed, heck his entire position changed last year.

Now his role is more clear, he's had the same coach for 3 years and there's stability. Stability is huge.

I think Rudy is also helping him and he's in a defensive role that's better suited for him (he doesn't have to defend the rim and hold down the paint like before)