The way I see it....
1) Sark seems fully capable of handling the CEO level duties on non-game day he recruits well, he speaks well, his press conferences are the best we've ever had since I started paying attention to UT football (McWilliams) and as best I can tell the big wig shitbags like him which is probably the 2nd most important aspect of this job after recruiting as it pertains to the CEO stuff
2) He does seem to be obsessed about his opening script and instead of abandoning it and adjusting to what the opposition is giving him he trudges on regardless of what version of Ewers (Jekyll or Hyde) shows up that day (this happened in both the OU & UW games)
3) He also seems to get perceptual narrowing obsessing over the strategy to break down defenses to the point that he loses sight of the overall ebb and flow of the game which is why his clock management always leaves room to be desired and we frequently don't use timeouts when we should have not to mention he does have that Pac-12 go for it on 4th down too often predilection (this part got better as the season wore on)
This is probably the simplest fix in history we just need someone who Sark trusts (see Pete Carroll, Nick Saban) to sit on the sidelines on Game Day as an adviser who can simply walk over and say things like "Hey Sark stop being cute and run the fucking ball" or "you should probably punt/FG here" as well as have timeout calling authority. Hell I would do it myself for flights, hotel, & per diems if I could get the gig ;-) That seems like a far more likely pathway to success than trying to convince him to relinquish play calling abilities and actually getting him not to micro manage it.