At this point it's hard to imagine Jaylen having a floor lower than "decent starter", but I have to say it's hard to visualize what he'd look like as an NBA superstar.
He has an awkward combination of skills: athleticism, decent handles, some hints of eventual catch-and-shoot competence, and a bit of a post game. I guess I can see him being Demar Derozan with better defense, playing the 2 and using his size to score in the post and his handles to score off the dribble. He's such a weird player though. Doesn't really compare to any of the elite wings in the league right now.