I'm pro-Clayton as a prospect (obviously, as a CBB player, I am enamored).
He's small and I doubt he measures well. So that's a huge knock / ceiling right off the bat. But his catch and shoot, shooting off the dribble, and absurdly quick release should translate. You also just have to love his clutch makeup. He straight put that team on his back against UConn, TX Tech and Auburn. I think he turns into a plus version of Patty Mills (better shooting) which would be great value in the second half of the first round.
I will also add (vibes guy comment) - how many of the guys, even the upperclassmen, who have had an all-time NCAA Tournament run like that have been NBA busts? I can think of Shabazz Napier, but the others I can think of - Kemba, McCollum, Andre Miller, Steph, Hayward, D-Wade et al - all went on to very good NBA careers.
I understand the perspective of not overreacting to the NCAAs. It's < = 6 games. But for the guys who absolutely crush it - it's highest-level basketball, against the best teams in the country, who are keying against you every game and you still go out and get yours. There's something there with respect to prospect evaluation.