You can't expect the guy to be given title shots or big rivalries straight away. Yes he's a good wrestler and was top form in NXT but in kayfabe sake this is now the main roster with the likes of other great superstars. It's very rare to see NXT men/woman go to the top straight away, when they do, they end up like Paige/Finn/Shinsuke. Only person that's succeeded and is doing great is KO