I posted a while back an article I read about Tiki Barber. In many ways Tiki and Julius are very, very similar.
In the article, Tiki talked about how he wasn't a complete back when he came in the league and he had to learn what it took to be one. That included his physical training, film study, everything. The past couple of seasons it's all come together for him and the results speak for themselves.
I see JJ the same way. He has fantastic ability, but he needs to grow and mature...mentally and physically.
I am glad we aren't giving up on him, because if he matures, (as Tiki has done), we will have a fantastic combo with him and MB3.