At @MicahZoltu’s request, I modified @timbeiko’s original note to be more inline with how I envision things: Executable Spec instead of Core EIPs - HackMD
The most substantial difference is that instead of maintaining Core EIPs alongside the other categories in ethereum/EIPs, Core EIPs would exist in subdirectories of the ethereum/execution-specs and ethereum/consensus-specs repositories.
There are also a few minor changes to branch names, and at which stages branches get merged. Oh, and using reStructuredText instead of markdown *hides*.