Always on Glance while charging is a feature of both 7.1.1 and 8.0. And also i noticed that Glance became brighter on 8.0. I advise to add some features:
1) Keep Glance always on while charching (off/on)
2) Adjust brightness ( normal(7.1.1) / bright(8.0) )
Burn-in effect on IPS is negligible against AMOLED/OLED
Now on 8.0 the brightness is too high. Its annoying.
Anyhow, just as soon as the Glance Screen is shown on your phone, just press the Display (On/Off) key once and it stays off.
It seems the glance screen stays on in Nougat too. Please send your feedback about this (and the brightness levels) via the Feedback App, so it gets properly recorded and processed. We very much appreciate your valuable input!
Have a great day!