Got 7.1.1 last night as well
This is exactly why I will stick with google products until OEM's or/and google sort out the android fragmentation crap! Don't think any phone has got 7.0 officially yet?
So far can't say I notice much difference, battery drain over night seems to have been fixed though.
Noticed that sRGB setting is in the developer options now but it doesn't do anything when it's enabled, not really an issue though since the 5x's screen is already rated as one of the best for calibration.
Camera seems a bit snappier and there are now exposure controls/slider when you tap to focus.
It is a shame they keep delaying the dark mode...