I agree with you fanaticguitars
only I am not giving it up, but ...
what I figure out is, they are providing new iOS versions, the same with macOS, they anouced as compatible, as better, as wonderfull ... , but in fact they are damaging the performance of our actual hardware. One decision I did for myself, is that NO MORE iOS updates, you stick yourself with the OS that was sold with your equipment and you are 100% satisfied and happy. usually I change my iPhone every 2-3 years and the difference of the new iOS during this period of time does not justify the problems.
this battery problem, I had lived with it with my old 5s from iOS8 to iOS9, and now the same with my 6s with the iOS9 to iOS10.
to make this battery issue arriving the hears of the Apple Engineers, we have 2 possibilities, or we go to a Genius Bar and present it and probably we are not able to demonstrate it and come back with nothing in hands, or install the Public Beta version, currently is the 10.1 Beta 3, which runs without bugs and gives us the oppurtunity to report back to Apple whatever is not running well.
I installed the Beta version since the version 1, and the battery issue I would say is parcially solved. no more over heating, and the battery lasts more than 24h, which is my goal. nevertheless is not 100% ok, for example during my sleep with the phone off the battery drains 12% out, or it turns off with the battery 50% full and then goes again alive without additional charging, the progression of the % is not even. But at least I have it reported back to Apple also with photos and videos and hopfully more guys all over the world are doing the same, so that the issue can be on the Apple Enginners priority list to be take care.