Rumor has it that Pete C was on the fence about being the OC. If Pete enjoys more of the background work and preparation vs the playcalling, and hiring someone like Gruden would allow him to go back to working in the shadows, I'd be for it.
Not a rumor...he didn't want to be OC, we interviewed Jay Gruden for the "vacant" job last offseason. Pete wanted to fade back to the backshop and ride out his time: