The Miz is the most underappreciated dude on the roster. Not only is he charismatic but can work a match with almost anyone, is willing to do whatever it takes to give the audience a good show, and can feel like a legitimate contender for any belt. If they want to have someone get some major heat they could start a Miz program where he starts taking out all of the favorites one by one on his way to a match with Reigns and have The Miz go over. The crowd would damn near riot if the payoff to Roman holding the belt for years was The Miz becoming the top champion again.