What you just said is the big reason most people on the IWC don't like him. He's not the most exciting guy who takes tons of risks like a Jeff Hardy. He doesn't berate the crowd or other wrestlers like a Chris Jericho. He stays within his character.
Personally I like the way they are setting up the tweener style for now. I could see him facing Hardy in another match at Night of Champions, restart an old ECW feud with John Morrison, or possibly another round with Kane right now. Punk's style of wrestling is very rare as he can have a solid match with basically anyone.
Oh I think he should start using the Anaconda Vice again as well, or possibly come up with another creative submission.
Another finisher, namely a submission move, would add depth to his in ring skills and make him even more of a threat. See, i don't like him because he does nothing special to me, doesn't entertain, just seems bland to me. I agree with Becca that the main reason i don't like him is he did get the title too early, and was booked awfully in it, to me, he still seems weak(but this is coming from the man who still sees Mickie James as the physco from her fued with Trish lol)