#2 Have him rebel against authority
As an eccentric personality, we haven't seen the Lunatic Fringe push the buttons of authority figures enough. Stone Cold's most famous rivalry was against the boss Vince McMahon, the two defined the art of 'going against the grain.' They were the first rage against the machine duo, and now Dean Ambrose needs to take on that role. It should be Dean Ambrose beating up and facing a heel Shane McMahon at Wrestlemania, not AJ Styles.
An ego-centric boss-type figure is needed for the best to be brought out of Dean Ambrose. Legion of fans love Dean Ambrose for his tendency not to follow the script and subsequently go off the rails. However, Ambrose needs to direct this unpredictability at authority figures. He should be the one who questions every decision made by the bosses and then bears the consequences in a way that makes him a hero to the crowd.