The thought of that scares me, because I remember what he was like when he was the WWE Champion, but maybe that is because of the stupid "authority" angle, which seemed to never end.
As someone who was heavily anti Rollins and am still not the biggest fan in the world of him by any means, I think he's performed very well in basically all of his big matches this year. More or less, if you ask me if I'd like to see Rollins or Balor get pushed up the card, I'd go Rollins strongly. Though that's partially me not liking Balor at all.