As a casual observer, Wemby is a highly talented, but unpolished, unfinished player. He is still figuring out his game. Ditto the Spurs 'style' of play. Lots of room for growth there. Dude is 22 and fighting for the big one.
I've seen Alex Karaban being compared to Sam Hauser. I think he will be a better passer with better, smarter off ball movement and, 'potentially' a better defender.
Tarris Reed Jr definitely got smarter about his fouling as the year went on. And he has some nice moves around the hoop. He has a man's body for the NBA. Certainly, foul shooting and shooting will improve. I believe he can hold his own defensively.