College basketball is so terrible, it's definitely a different sport to my eyes lol.
Gonzaga is the team I watched the most, so maybe I'm being biased, but I think playing the NBA will make Chet look a lot better. Their guards were just so bad and they were always backing the paint trying to force some high low action. I think he will be a force in PnR in the NBA. His touch around the rim is so good, and then he also shoots 39% from 3 and can handle the ball too. He's not built like Ayton, but he has the same super high skill level/touch and I actually think he plays tougher/smarter around the basket. Defensively I think there are certain matchups that will give him trouble, but I think he will be great in drop and even better in the Giannis role. OTOH, he's so skinny and will likely always be skinny....he has a Nerlens Noel frame and doesn't have wide shoulders like Rudy or AD. His offensive game is very good, but he's probably not scoring 25+. But I don't think that will get in the way of being a guy who scores 20+ points on crazy efficiency while also being one of the elite defenders in the game.
This is my personal Dunning-Kruger, I don't know much about draft, but I feel so confident in pinning the player Chet will become lol.
A 6'10 Harrison Barnes is still really good like you said, I didn't give that enough credit. I can't deny that there's some Tatum in the way he moves too. I could easily see myself flipping to him as the no 1 prospect with time.