Suspending disbelief - sure. The guy is one of the most talented wrestlers in WWE, so he can pull off almost anything. But, in reality, he'll be the new Kofi Kingston WWE relies on to put green heels against to get that win to make them "credible". Very few are on Dolph's level of making others look good. He'd be WWE's scapegoat.
As for the face pops he gets, it's because WWE aren't booking him as a heel. He comes out with the jobber crew (or characters the fans don't care about), wrestles wonderfully, and then leaves. Their shit heel booking > their face booking though. Punk gets face pops all the time and has done for a LONG time, but he was good enough as a heel to get more heat due to his excellent promo ability and the way he was booked. If I see any Roode in Dolph, it confirms he can shake off those face pops with guaranteed promo time.