Hornets forwards and centers

According to Wages of Wins:

Every one of our big men except Ryan Bowen has dropped in production since last year.   Didn't we lose one of our assistant coaches in the off season?   Is it possible that whoever (if anyone) is coaching our big men is not as good as last year?   I'm ignorant of who is supposed to be coaching which players, so I could be completely off base.    I know injuries have been a factor, but this across-the-board decline in rebounding and interior scoring leads me to believe that there is something in the coaching that might be partly responsible.