2 main reasons, he's constantly waiting for the last moment when he's shooting to change to a pass. That can't be conducive to high shooting %'s long-term. also sometimes he waits too long in the shotclock trying to make something happen, and has to take something akward to try and hit the rim.
Secondly, he just genuinely looks rushed, like a QB who feels the blitz before it comes.. Especially inside the arc, he kinda shoots like someone who's worried about getting blocked. You could honestly see it early on, taking that floater from some less than ideal angles. He stops on a dime, but its kind of a violent type of movement, rather than something that looks natural and easy -- Hopefully he's just a rookie, and he settles down.
His %'s last year in the ACB indicate that his current shooting %'s are probably not just bad luck and a small sample size.. This is how he plays. 32% from 3 is passable, can he maintain that tho??