As much as i don't want to see CM Punk leave the WWE, i don't blame him. And as much as it would pain me to say it, i want to see Daniel Bryan leave as well. WWE as it stands is a complete joke, Batista comes back week before the Rumble and wins it and heads to the main event vs the WWE champ (most likely Orton). Whilst guys like Daniel Bryan are slated to face Sheamus at Mania (which no-one wants to see) and Punk (who works hard for the company) being left out of the main event.
Hopefully he doesn't leave and McMahon works out the issues with Punk so he comes back, but if he does leave i reckon he'll go back to Ring of Honour and finish up his wrestling career where it all started. And if he does leave, WWE have shot themselves in the foot. Punk is one of the top superstars in the company, and him and Daniel Bryan are 2 stars who know how to wrestle and put on a good show.