The Rizzi idea is an interesting direction I had not considered. Elevate him to HC, keep Kubiak and hire a DC to take the reigns from Allen. It's not a bad idea; certainly realistic. I would put that situation on a short three year max leash and see if Rizzi can get it done. They need to clear up the cap next year and part ways with Carr after the 2025 season.
That can happen tomorrow. Joe Woods is the DC and can do that job and Rizzi has assistants that can run Special Teams on a week where we are unlikely to practice in any significant way.