I received the 4.2.x updates on my Nexus 7 and the performance has been awful. I tried the Forever Gone hack and it helped but it's still much worse than 4.1.x. I'm not so excited about doing a factory wipe in order to make my system almost as good as it was a month ago.
I've never tried rolling back a stock system before, is it possible to download the official nexus image zip and install it from CWM recovery? Or do I have to do a more involved wiping and flashing process? My system is stock 4.2.1 rooted and unlocked, with custom recovery.