I posted this somewhere else on this site but I'm not sure if it was the right place. Anyway...
I don't know if people are still interested in this but I found a temporary solution for this battery drain thing, until an update that fixes all this comes along. I have a Sprint Note 3, not rooted.
Like everybody else, I had great battery life, until one day Android System started being the no.1 battery hog, followed by display etc.
I found an app called AppOpps , and what that allows you to do is turn off individual permissions that every app on your phone has. And it shows you in real time, what app is using what resource.
For example I found out that GoFlashlight was using the camera in the background (uninstalled out of principle). Skype was using the camera in the background even though I was signed out of it. Etc etc.
When it came to apps that were using my location, one of them was a package called .... Android System v 4.4.2 ....

So what I did was to turn off its permission to use Location, and if you go all the way down, you can turn off the Keep Awake permission.
That's it! Enjoy your great battery life once again!