I gave up on the NIP PR process and now just make up and kinds as I see fit. Anyone can implement the same spec. So far its working.
As long as those kinds are well-documented so others can use them, I see no problem with that. The thing that is currently lacking, though, is an organization tool by which everyone can find and track disparate specs created by various Nostr developers. Wikistr and Wikifreedia are good attempts in that direction. @liminal @Laeserin this is what Alexandria can help solve.