i used v1.0, v1.1 and v1.2 - at some point I always had an overheating issue at the backside of the phone, close to the camera. I believe there is the cpu?
I had this overheating issue with official roms too. actually for quite some time already.
needless to say, this drained my battery pretty quickly.
well ok, why this posting? because I think i have found out the reason, at least for me.
do you use twitter? do you use the app tweetcaster? well I do - and everytime at some point the app did not close properly. the app drains in the background, not noticeable by the stock task-manager. i did some more analysis and noticed that the cpu was nearly constantly used by it. couldnt find any other app doing the same.
anyways - not wanna talk bad of the app at all - but since i removed that app and replaced it I havent had the overheating/draining issue again.
phone is always cool now. draining 6% in 9 hours during the night and if in regular use (the usual stuff, call/social/media) 24hours easily.
so - if you have an overheating/draining issue, it might be due to an app that is not closing properly - and not the rom in general. thanks android for a real lousy process management.