LineageOS provides the root flashable zip for any of their ROMs.

I will read more into the security claims and concerns, and may be persuaded, but at first blush I support not spoofing application signatures, as this is the same sort of chain of trust that package managers and app stores are built on.

As a consumer, I appreciate that LineageOS with Google services passes most to all of the CTS/Safetynet checks, and doesn't make me choose between having an updated, streamlined version of Android, and using my bank app, or playing Pokemon Go.

I think merging these changes could easily jeopardize that and maintaining it as a fork makes sense to me.