I’m happy to accept this PEP! Congratulations 
I will mention there’s one bit of wording that you might want to clean up. It doesn’t really affect the contents of the PEP, but the Abstract still references data-dist-info-metadata as the pointer for the location of the metadata file. The rest of the PEP has it correct, so this is just missed reference that should ideally be cleaned up. But either way, the PEP looks good to me.