You definitely have more training room on him. His IS is a problem, but you can probably make him an outside oriented SF who will outperform his salary.
It doesn't look like you have any other trainees right now. I'd suggest going out and picking up a couple of cheap 18yo guards with allstar potential. This season I'd train OD and PA,trying for 4-5 pops in OD and 2 pops in PA, maybe that pop in JR you were talking about. After that, I'd maybe sell the 18 yo guys for a profit an switch to training ID,1v1 for Forwards and Rebounding, picking up a few guys to train along with him again.
Also, I took a look at your arena...it's too bad you went and maxed out your luxury boxes so early. I'd suggest building A BUNCH of bleacher seats an some lower tier. You need more seats!
Good luck with this guy!