Punk is well above midcard level. You're saying he is no better than Kofi or Cesaro? Please, that is just ridiculous.
That's exactly what I'm saying, and I don't see why it's so ridiculous. Compare the physiques, presence and movesets of Punk, Kofi and Cesaro, and you'll see that Punk is much more suited to the mid card. Against natural main eventers like Rock, he simply doesn't cut it, IMHO. The Rain King's post above serves to highlight this beautifully.
He is the cornerstone of WWE and he is the reason that this business runs.