I'm a guy that looks at all that small stuff, like the rotation of the ball, but I'm also a results guy, and it's hard to argue with his results, at least as far as his three pt percentage goes. My biggest concern with his shot is the fact that he brings the ball out in front of him before bringing it up to his shooting position. I think that works as a spot up shooter, which is basically what he his right now. But I think that motion, which is on the slow side, might be a problem if trying to shoot off the dribble, which he seldom, if ever does.
That's not thing that would drop him down on my board, just something that he needs to correct if he's ever going to be a player that's able to create for himself off the dribble. I also think it should be pointed out, that if this last game is the only game you've ever seen from him, it may be his best overall game of the year. He's also had his share of stinkers, so you have to temper your judgement a bit, and not base it on just this one game. That said, I have at number three on my board behind Doncic and Ayton, but ahead of Bagley and Porter.