JI has been super mature and shown flashes of beating his man off the dribble. Hes played his role being a 5th option (as he should be at such a young age and trying to stay healthy) I think its lame to try to put a ceiling on a guy who's shown some amazing flashes, provides all NBA caliber defense, and has little to no major flaws. Hes played for 2 years. I could list 30 NBA superstars that haven't looked as good as JI they're first 2 years. Let's get realistic here.
See Kwahi Leonard, Tracy McGrady, Scottie Pippen and Kobe Bryant even to some extent.