There was discussion many years ago of this possibility. A realignment of Divisions. I think it was going to be exactly that ... Bills, Steelers, Cleveland and Cincinnati. Alas, ownership clung to the Bills-Miami rivalry and others and the idea faded. So, hypothetically:
New Division: Pats, Jets, Ravens, Indy
New Division: Dolphins, Titans, Jaguars, Texans
Then keep existing AFC West