Don't worry about it, I'm still on Android 7.1.1 Nougat, the phone is rooted and can't be chewed to unroot to update, to be honest I've forgotten how...
Strangely enough I'm still using 7.11 nougat
I've never once used my front camera, just live without it and stop your selfie antics
I need to update I'm still on oxygen 4.50 and android 7.11
I left mine on nougat, never did upgrade
That would be the 'shelf' screen that oneplus use, you would lose that
Evie launcher is virtually identical, and if I recall rightly the bottom strip is not highlighted, that said you will lose your quicklaunch ability...
I think the new launcher is almost the same as evie launcher
It's meant to