I'm not going to rip JJ. He's not a good defender. Easy. Okay. But, good teams can support a poor defender. Luka's defense was a joke at one time. Curry's defense has been a joke. Harden. Even LeBron gets ripped for being only an occasional, 'splashy' defender.
The problem with JJ is that he's relied upon to be the team's star, and he should/would really only be the third or fourth best player on a good team. That we don't have take over guys or guys who can more reliably create their own offense is not his fault. That he takes a lot of threes isn't really his fault. Who else can/will/should take those shots?
We have no offensive scheme other than iso or post banging. Not his fault. That he can average 18 points, low efficiency or not, in this schemeless scheme is something.
I hope we have him back, but surrounded by players who can help him to be a more efficient player. He makes tough plays. He doesn't shy away from (offensive) challenges. I can't see us buying enough portal talent to displace him, so yeah, i hope he's back. He's not The Problem.