I had this issue on my One Plus One and they said the latest Google play Services update messes around with your phone and prevents it from going into a deep sleep but that was only for custom roms not TW
Is there any way to check if the phone is in fact going into deep sleep or do we need an app. Don't like battery apps
Use CPU Spy to see if your phone goes into deep sleep.
https://play.google.com/store/apps/details?id=com.bvalosek.cpuspy.realgpp&hl=en
Mine does and it seems that my biggest battery hog is my screen on 21% and Google Services on 9%.
