Indeed. Today for instance, I have 30 min SOT. My battery is at 68%. For some reason Google Play Services is now chewing up battery. Yesterday it was a champ. I had over 4 hours SOT when I went to sleep in plugged it in the charger. Today? I'll be lucky to get over 2 hours. This thing is so inconsistent that it is frustrating the heck out of me. It's sad because I love the S6 more than any device I've had. Screen, camera, build, size, speed are perfect. Everything but the dang inconsistent battery. It lasted all day like a champ when I first got it. 5 hours SOT regularly with little standby drain. Now some days it still does that while others it just drains like crazy. I've done a factory reset to see if it was something I've installed or something syncing way too much with no improvement. I know AT&T pushed out a small update a couple weeks ago, don't know if that is the root of my problems or not.
Either way....G4 is ordered. Gonna give it a good 14 days and if I like it almost as much, the camera is comparable, and the battery is an improvement, then I will sadly put my S6 on swappa. Even if I don't keep the G4 I may just go back to my trusty old Note 4 or iPhone 6 plus.