Whether his reign has been good or not, it has given Rollins himself a chance to improve. His matches are always great to watch, and he sounds so confident and comfortable on the mic. His post-Shield character is well-and-truly fleshed out as well. His time on top has really helped him develop both on-camera and off. He will likely end up a victim of bad booking over time, but once his reign is over, he'll be a lot more established as a star and able to hold his own as a character.
Plus, I don't care much for jobbing, as it's the story-telling I'm into. All his feuds have been fun and exciting. I've enjoyed his reign.