Went back and reread your post, and think maybe you were talking about Bagley instead of Ayton. If so, I'd say that your comments were warranted to some degree. I don't see Bagley being able to play center in the NBA. Well, maybe in a small lineup situation, but overall, I see him as a PF with the athleticism to guard a couple of positions. There are times when Bagley is very good on defense, and other times where he loses his man, or gives unnecessary help leaving his man open. All correctable problems. He's a terrific rebounder that rebounds out of his area, and I do think that will translate to the NBA.
Duke has Bagley playing mostly in the post, and I understand why. He can out quick most of the competition and has excellent footwork down low. Therefore he requires a double team most of the time, which open's up shots for Duke's guards. Unfortunately, it doesn't give us much of a chance to see what kind of game he has away from the basket. When he does take an occasional jumpshot, his form looks good. He has a fairly high release, and he goes straight up with the shot. He has also shown, rarely, a fade away mid-range shot. Haven't seen it enough times to make any judgement on it, but at least I know he can execute it.
Bagley is interesting because he could end up being a good rotational player, or he could end up being a HOF player. That's a fairly wide margin. Where's that crystal ball when you need it.