You don't hire a head coach because they are a good play caller. You hire them because you think they'll be a good head coach. That's true of Sark, Ryan Day, Marcus Freeman, etc. Turns out, Sark is a really good head coach. At this point, he's significantly better as a head coach than he is a playcaller. For get elite, he wasn't even a good play caller for extended stretches of every game the last half of the season. Did Ewers struggle at times? Sure. Did the running game struggle against good defenses? Yep. That happens and it's the play-caller's job to figure out something that does work. That's what Sark struggled with this year. If someone else were calling plays, this board would be calling for their head. No one is hired to be a "CEO Head Coach." They are hired as the head coach and then assign roles and responsibilities to staff. Sark has chosen to call plays himself and it is limiting the potential of his team.