I don't care about the Shaqtin a fool stuff--that's normal for a 20-year-old. I agree he's ultimately a great roleplayer though.
If Jabari just shoots more consistently he could be. Like there's a ton of forwards that were not very athletic and became star players. Bari will never be Blake Griffin but if he's hitting his threes and just gets better at raising over smaller dudes and hitting mid range shots that's easily 20ppg. Easily.
To be expected from a 19 year old Rookies are rarely good defenders, Thompson twins are a rarity, and 21
Jabari’s two great weaknesses are jumping from standing position and putting the ball on the floor. The first is physical and won’t go away so he has to find a way to overcome it, footwork, fakes etc. The second one, he should work on it like crazy.