After setting up Nova Launcher, using button navigation, the home button would only go home from certain places (such as the app switcher). Also the nav buttons were not centered - instead there was a Taskbar with some of the system apps, and I couldn’t change which apps were on it at all (besides disabling the apps themselves).
So I had to finally learn gesture navigation. It’s not as annoying as I expected it to be. I actually like it for the most part.
I had to change the font to the AOSP one instead of Lenovo’s one because in some places it added extra spaces to apostrophes, but conversely I had to switch the system spell check from AOSP to Gboard because it was marking as misspelled any word that was followed by a period. (Like that one, or this one.)
It doesn’t support work profile and therefore apps like Island or Shelter - but does have a built-in app copying system. It’s not as good though, I copied Chrome and couldn’t find a way to log it into my ‘alternative’ Google account (or even my regular one) because it says I have no Google account, then it opens Settings in my normal profile - with the account(s) - instead of the empty copy profile so I could add one the copied Chrome could see. (Can’t copy Settings or other system apps either)
Still no GPS, which is not as much of a problem for me as it used to be when I played Pokemon Go all the time
Stuff like that, nothing I’m considering a serious problem.