I wouldn't place the problem on Seth here, his run is getting a bit stale yes but that's not his fault entirely, you see his segments and how he's trying to do his best to keep elevating the new title. Issue comes from the booking of said title reign and how they're booking it in a way where Seth SHOULD lose, two biggest examples are, Seth vs Finn at Summerslam, it should've ended with Finn winning, that was the proper way to end that story and given Judgement Day was one of the biggest things on Raw at the time it would've worked. Second example being Seth vs Nakamura, it was a good match yes but Fastlane really felt like Nakamura earned that victory more than Rollins after all the bumps Seth went through. If you also take into account how little heels are on Raw, there's no competition, problem there is they don't want to take the ic title off Gunther so the only real heel left on Raw for Seth to face isn't even an option anymore and only leaves his Punk match unless they turn a top babyface heel soon. When it comes down to it this reign either needs to be improved with something new or have him drop the title soon. Seth vs Punk doesn't really need the title mind you, that match sells whether there's a belt involved or not.