hearing what BJ has said he wanted out of his coaches and how he's going to handle things as a HC... I'm led to believe that he'll let DA run the show on defense, Hightower will run the show with ST, and Doyle will be doing many of the tedious and time consuming things BJ did as an OC that he won't have time to do as a HC. Given his age and lack of experience, Doyle is probably eager to do whatever is asked of him, where as a veteran coach may want more control and isn't eager to put in all the hours that BJ will be expecting from them.