one of the nice things I've experienced with the battery is I don't have to disable half the phones features to get decent battery life. my biggest drainer is Clash of Clans. If I play for an hour or so, or watch a Netflix movie (which I've only done once) it dramatically decreases my battery.
I remember when the S6 came out and people literally had to disable half the phone's features, that they paid for, just to squeeze out 4 hours SOT.
It really varies from person to person though. For instance, if I'm streaming music from a great signal, and you're doing the same thing from a weaker one, that's gonna have a significant impact.
Here's all I do ... 1) brightness low which is my preference (unless outdoors of course) 2) 30 second screen time out 3) black wallpaper 4) dark backgrounds when possible 5) no widgets, which I hate anyway 6) a strong signal in PA courtesy of VZ 7) disable Bluetooth when not in use
That's it. I leave location on, don't have any special battery saving apps or anything, and 99% of the time I use WiFi instead of data (I never turn data off though). I only check Facebook once a month, if that, so I don't have the app. I'd say the 30 second screen time out and strong signal help the most. I get a little over 5 hours SOT and it lasts the day, unless I'm playing CoC then it'll need a 20 minute charge.
Last thing, if I'm on an app like AC, with the dark background, the battery doesn't drain much at all. Same thing if I'm web browsing. But when I play Clash of Clans, or I'm on YouTube it drains significantly faster.
As far as Doze I had a one week period where it wasn't functioning properly and I'd lose 10% overnight. I didn't do anything and now for whatever reason it's more like 2-4%. If you have a strong signal, you're not draining the battery by playing games all day (which I know you're not), your brightness is low and screen time out under a minute, and you don't get about 4 hours SOT, and/or Doze isn't functioning properly, I'd definitely contact Google.
I'm amazed with some people's experience with the 6p (like Alex in that article yesterday). It's like we're using two different phones. I've had issues with people hearing me on speaker phone, but that's it. I've had none of the issues people, certainly Alex, have experienced. Battery is the #1 reason I bought this phone and no way I'd tolerate anything less than what I paid for. And like somebody else mentioned, we shouldn't have to disable half the phone's features, on any phone, just to get the battery life these OEMs advertise.
Good luck and my apologies for the long winded response. Just downed two cups of coffee and I get worked up when good people have bad experiences with battery life.