I wouldn't mind seeing it if it were a short term thing. It's certainly not something I'd want to see last over a long period of time. But if they briefly turned face for a feud with the Wyatt Family (where they were maybe portrayed more like tweeners who were simply the lesser of two evils) where a loss to the Wyatts is what finally caused them to split, it could work. Rebelling against The Authority would work even better considering Triple H is one of the greatest heels of all time and has the ability to make someone into a big star when he wants to (see: Batista.) I agree that in that scenario the best way to go about it would be mainly Rollins and Reigns rebelling against HHH while Ambrose mostly just played along with them until he decided to betray them and show that his true allegiance was still to The Authority. It could easily result into Ambrose defending (and dropping) the US Title to Rollins while Roman Reigns defeats Triple H, with both happening at Mania.