Been running this since it went live. I've encountered only one bug that bothers me. on occasion when I open a folder the icons share the same opacity as the folder background. This makes the icons difficult to use.
GravityBox, Greenify XPosed mods work fine.
I'VE EXPERIENCED NO DROP IN BATTERY LIFE.
If anything it's gotten better. I regularly run on battery 15+ hours before plugging in when I go to sleep. Battery percentage is around 35% when I do. That's with 4+ hours screen on time and playing multiple games, browsing etc.
I did turn off the persistant search bar and "OK Google" function because talking to a computer makes me feel like an asshole.
This is my daily driver now. My only complaint is the issue with the folders mentioned earlier. I've even been considering titanium backup of my apps then do a fresh install after a reset. CM says you shouldn't have to, but clean installs remove any questions in my mind whether the problem is in the ROM or my phone.