1.Is there any flashable zip for firmware only? Or I have to flash the entire moto stock rom and restart the flashing process of lineage?
Also, the pie pixel experience by you was really good, any chance of that on Q?
There is a flashable stock ROM, but just reinstalling the latest version would be better when done manually
2.
He could only maintain unofficially, as official needs the maintainer to own the device (which he currently doesn't)