Installed grapheneOS on my pixel (finally) the other day. Actually was loving stock, until it got corrupted due to a bug. Had to factory reset to boot up again. Anyway, used that opportunity to install GOS.
NGL I do miss adaptive features and now playing, but I am liking GOS more and more day by day. Better battery life despite not having adaptive features, more security options like sensor permission and scopes, auto reboot if not unlocked feature and all that.
I use GPay and my bank app on a secondary profile. works seamlessly. Some UI improvements and adaptive features and it will be on par with the stock pixel experience itself.
You could do the charging stuff with magisk modules (acc is the most known) if you are willing to root. What is your SOT? My battery seems to be quite bad having to charge twice a day.