This would be called a reload. Also what has Brady done that makes you think he would be an effective OC?
As a rookie playcaller Dorsey has a lot of room to grow. I think it's kinda foolish to simply think nobody is going to learn and just constantly be the same year over year. If that was the case Daboll would never have gotten another job in the NFL after his first few stints.
In general, you learn far more from failures in life than successes.