[Galaxy S6 General] Nplus1:
OK so I have some observations regarding the lollipop bugs and the battery on S6 in general.

First of all, most of us probably use GSam battery monitor. However, when comparing with the system battery monitor in Android I notice there are ALWAYS differences in SOT for example. There doesn't seem to be any rule, sometimes GSam shows more, sometimes less, sometimes there's a 15-30 min difference, today I'm noticing as much as ONE HOUR difference. So one clear proof of how messed up the battery reporting is on lollipop.

Then we all know there's a radio bug in lollipop affecting the battery life. As usual, today I was looking at GSam and had 2h20m of SOT which took about 25%, then I had phone radio at more than 50% and Wi-Fi+apps counting for the rest, but "in practice" the battery life seemed decent with only 15 min of wakelocks. The strangest thing happened as soon as I connected to Wi-Fi: the battery usage of the phone radio dropped to 7% and SOT increased to 64%. I have attached a screenshot, but unfortunately I didn't take one screenshot before connecting to Wi-Fi.

The first days after I got the phone, the battery life seemed good with an estimated 7-8h of SOT (GSam estimation) and at about 30h-36h of battery life. As soon as I disabled some of the bloatware (including some of Samsung's processes) the battery life seemed to decrease although I didn't manage to understand why - Android OS and Android Kernel were the only "suspects" so this doesn't tell anything. The GSam estimations also dropped significantly reaching a 5h SOT which was coherent with what I noticed in practice.

I just got a Galaxy VR and I wasn't able to install the Oculus store because of some disabled packages. I re-enabled everything in order to install the Oculus store and thought about giving it a try without disabling anything. Surely enough, as noticed in the screenshot, the battery life seems good again: 2h24m of SOT and still 66% to go.

As a usage pattern I charged it fully last night before going to bed, took it off the magnetic charger and left it like that over night: Wi-Fi on, several accounts synchronized, high accuracy location enabled, NFC/Bluetooth off. The drain during the 6h sleep was 2% (I ALWAYS have 2% drain over night) so when I woke up the battery was at 98%. 15 min of browsing on Wi-Fi then switched to 4G+ for the rest of the day (about 8h) and did only browsing on Internet app, a bit of Tapatalk and Whatsapp.

I am absolutely aware that the radio bug might just not have been in effect today, but I feel that re-enabling all the services might have helped. By the way, the uptime is 186h so no restart lately. I even disabled LUX and kept the system's auto brightness just to see if that might help.

Bottom line is, if you have disabled a lot of bloatware you might just want to give it a try with everything enabled, or just disabling what the system lets you disable (not using Package Disabler).

Second observation, in order to have a more accurate GSam estimation on battery life, I suppose the best thing is to charge the phone fully before sleep and keep it off the charger during the night (especially if you manage to keep the wakelocks to a minimum), then use it normally. This means that stand-by time is taken into account for the battery life estimation. If instead you keep the phone on the charger throughout the night and disconnect it only when you use it, the stand-by time taken into account by GSam is going to be greatly reduced and basically maximum and average battery will be closer and closer.