Eagles blog 'McNabb or Kolb' put a magnifying glass to the decline of DRC's play over the course of last year. While the information presented seems pretty damning, in the same breath it's really not; & I draw attention to one specific quote from the article:
'Rodgers-Cromartie is capable of playing at a high level in spurts, but to do so consistently he needs special attention from coaches. That's not something we expect Kelly and his team of 50 assistant coaches (give or take) to have time to do, right?'
In actuality the reason why Chip brought on those '50' coaches was so that he can pay special attention to each player IMO; and ensure that they (coaches & players) understand how he expects his brand of football to be played. Good read though.