My Galaxy S6 updated on Nov 29th with the G920VVRS4DQK1 update. Immediately afterwards I've noticed a significant decline in battery life. No new apps had been installed on the phone for quite a while before the update, and in a vain attempt to try anything I even removed several recently with no change.
I don't know what was "fixed" in this most recent update, but you broke something that now uses a lot more battery power in the background. I can just sit and watch the % drop on my screen while not doing a single thing!
Also the "activation not complete" has popped up again. In the last update they fixed it where it ran a thing and said phone already activated. Now every time I reboot my phone I have to force-stop the activation wizard to make it go away...
Very frustrating as now I have to charge my phone two to three times a day (excluding plugging it in overnight when I go to bed). Before this last update I could consistently go a whole day easy without having to re-charge!!!! And I am not a heavy user either, I will do a little searching and maybe play a couple games for like 20 minutes total while waiting.