My wife has the Note 5. Before receiving the Nougat update, the batery life had tanked a few weeks ago and late last week the auto brightness sensor died and it would not reatate the screen. We turned it off and she was using out backup smartphone.
My first step in troubleshooting the sensor issues was to be a factory reset, but when I turned it on the Nougat update was waiting. I decided to give it a go, installed Nougat and performed a factory reset. I always perform a factor reset after an OS update, so as to have a clean install, just like I would do for Windows.
The battery life has been much better and both sensor functions returned. Going on three whole days now.
I took the question to be out of curiosity, as opposed to accusatory.