I am confident that Ochai will be a good offensive player. I think in a year or two he looks a lot like Buddy Hield this year (~8 3PA per game & ~4 drives/fast breaks) but with a little worse 3% and a better 2% and averaging 14-17 PPG. There is a chance he becomes more, but that is a really great complimentary player.
The real question for him is how good of a wing defender can he become. Right now he seems to have the desire and physical attributes, but needs to improve in technique and scouting. If he becomes a plus defender (not all defense, but good like DFS) then he is going to be awesome. If his defense slips then he is a Malik Beasley level player. All about the defense.