I don't know how anyone that watched BHH would consider him an "elite athlete." He truthfully doesn't have the quickness to play PF (maybe in college, but certainly not in the NBA). He's very long and has good strength for his age, but as far as agility or explosiveness, he was certainly not elite. Probably "good" for the college ranks, but straight up he isn't even as athletic as Fulky (at best on par with him). Now his ceiling is far higher than Fulky don't get me wrong.
If he has a future in the NBA, he is going to be playing the 5. He reminds me of post knee surgery Harry Giles. His skill game is very much lacking at this stage, he can't shoot at all, even in the midrange (he shot 15% from 3). Decent rebounder, but has no real feel for shot blocking. At the college level his lack of foot speed can be made up mostly by his length, but that obviously doesn't work in the NBA. He doesn't have good hands at all at this point, as he dropped a ton of passes in close. That is something that can certainly be taught though.