You know what the difference in Rock/Punk and Rock/Cena is? One is a wrestling angle with two characters fighting about wrestling things, and making for a hot feud. The other was about two petty individuals that would rather tear each other down personally than sell tickets. One has already proved to be better TV than any moment from the prior feud.
Until Dwayne shows up next week and ruins it.
If you're truly upset with Cena putting himself before the company or the "story" then wait until you get a load of what Punk does with Dwayne. He's not The Rock anymore.