Finally got a 7D Mark II in November 2015. Weather hasn't been great so I haven't shot with it too much, but very impressed already with the AF system.
Still, finding the battery drain issue described, even with the camera off and GPS disabled. Charged battery last night and it was 100%, and by the next night it was down to 99% after just sitting in the box (brand new LPE6N Canon battery).
Found this link online:http://community.usa.canon.com/t5/EOS/Canon-7D-II-battery-drainage/td-p/128736
About 4 down, there is a post from MickvK about it being the LCD in the viewfinder. I tried his test of Manual Focus with power off, then removing the battery and he's right--the OVF goes "gray" without the battery even when off. Not sure if he's onto something or not, but perhaps the more technical members can comment.
Interestingly, I repeated the same steps with my original 7D as well and I get the same phenomenon of the OVF going gray when the battery is removed. Is his diagnosis likely? I never really noticed the original 7D battery losing power, but then I'd never checked the actual percentage figure before.