I'm the only one having got a lot of parts of the system with slowness and a worst battery life ? (i can't neither reach the night)
My new iPhone 7 128 is great and my battery life and performance is much better then my 6s. I also like the new home button.
If your having all those issues with your new device, it might be time to make an appointment at the Apple Store Genius Bar and have someone look at it.