I've wondered this too. Dude looks like he's playing for cardio at the rec. Looks like he's liable to walk off the court and check his cell phone at any time. And he fumbles the ball almost every time he attempts a dribble move.
Ive felt for a little while now that he resents Lebron a little bit. His stats and overall status as "that guy" has went down. Although they've won a title and will have a chance at another on Thursday, I dont think the big 3 have truly panned out the way he wanted.
I also feel thats why you will see him in games trying to takeover when he really doesnt have it like that anymore. He stays taking bad/forced jumpers that hes never been able to make (trying to put up numbers to show hes as good as Lebron). He needs to drive to the bucket if he wants to be effective.
I was wondering this same thing about Paul Pierce...I just want to know how did his handle get so shakey all of a sudden, he loses the ball just dribbling it sometimes.