I think you guys are forgetting just how bad this guy is on defense. It's an extremely limited sample size, of course, but so far this season opposing 3s have an unreal 22 PER against him, and he's letting in 1.09 points per play (just as horrible). These numbers may not mean that much because of how few games he's played (the Synergy PPP numbers are based on 46 plays, but those 46 plays put him at 394th in the NBA), but it's not helping his case.
The guy can flat-out volume score and he's going to make a lot of highlights so he's probably useful towards the end of a roster, but he's not anywhere near an NBA rotation player and likely will never be. But he's certainly fun to watch.