Look, I’ve been pretty adamant that I don’t think he should give up playcalling. It’s his biggest value add and there zero guarantee handing that off makes him a better overall head coach.
The thought of him being able to do more game management is also kind of ironic because head coaches get most involved in stuff like short yardage, 4th down calls, important playcalls, etc, so if you are pissed at that stuff now is that going to change? It also creates the possibility of a revolving door of playcallers because what if the guy he picks leaves for another job in 2 years? Is he going to start doing it again? Trust someone else? What happens the first time the offense struggles?
With that said, I do acknowledge getting over the final hump is always the most difficult and often requires the biggest leap so I understand those that are wanting it. Maybe there is a middle ground where he can get an assistant, analyst or special assistant with an offensive playcalling background to get a different voice in the room and bring new ideas.