He's a good shooter and could be a successful NBA player. I don't think he has the strength to be impactful on the post, either offensively or defensively, at the next level. So Ryan Anderson. I also do question his shooting a little bit -- the percentages are fine, but at only 2 a game, he's really not a volume 3-point shooter, which is what he'd need to be in order to maximize his NBA value. Also, with such a small sample-size, it's questionable how great of a shooter he is. A bad three game stretch could knock him to 40%, which is good but not special at the college level.
I don't think he should be a lottery pick if he comes out this year. If he stays longer and develops his body a bit more, he would look like a higher pick. Consider that he's got 3.5 inches on Jaylen Brown, but weighs a few pounds less.