I disagree. What Seperates android and, Imo makes it better, is its customizability. The fact that apps can update in the background. This is great stuff and makes android much more fun and, in many ways, more powerful. But this comes at a cost. And the cost is battery life. That's why I say the gs6 battery life isn't bad, it's just not good. The reason is simple, the battery is too small. For some it's fine. For others it's not. For the people who don't find it acceptable there is the note 4, z3 ( soon to be Z4) and the G3 (soon to be G4). But to think that a setting or software update is the answer, well, it isn't.
I don't think simply upping the battery size is smart way. Apparently there are many getting good battery life over 5 SoT and it means S6 hardware is capable of decent endurance performance if it's not bogged down by some software glitches. There is definitely some issues with Lollipop right now. There is nothing wrong in trying to address issues by adjusting some simple settings. It's not like micro-managing as it's just one time change at least until next major update comes. If you are getting only 2 SoT, I think there is something wrong with yours, either software or hardware. Even if S6 had 3000mAh, that would barely get it around 2.35 SoT for your case. Something else must be fixed.