Yeah, I'm not seeing the good athlete (like his best game on youtube he gets partially blocked by the rim on a 1-hander), the 6'8 part, or the ability to make layups. He looks like Grevis Vasquez with a flashy handle (and from scouting reports I've read he isnt even good at dribbling, just occasionally flashy.)
I'm guessing he's 6'6 w/o shoes with a 6'7 wingspan. His reported weight I see is 180 lbs as well, so he's a weak string bean who has no shot at getting downhill in the NBA and finishing, especially if his handle is sus.