I was not assuming that the coaching staff was not working with Derrick. In fact, I firmly believed the opposite. Crean worked with DJ, as well. That staff chose to go to a shooting coach in the offseason to help DJ. That is what I suspect is under consideration for Derrick. With DJ, his form needed fixing. Derrick's form looks fine, maybe a little tweaking, but nothing major.

It may be psychological. It may be that he just does not have the depth perception to be a good shooter. Who knows. He is not good right now.