I think Richt would have turned over the staff, but he knew he was getting sick and that it was time to retire.
BTW Thomas Brown is the RB Coach and Assistant Head Coach for the LA Rams.
I think he meant that everybody knew that Brown was a glorified position coach, and Richt himself ran the offense.
In addition to firing his son as QB coach, Richt needed to fire himself as playcaller. Which he didn't seem to be willing to do.