@smallcirclesjust small circles 🕊 "today"? Are you imagining additional fediversal protocols that aren't organized by time? Space (maps), topic (wikis, library catalogs), semantics (glossaries, dictionaries), ontologies (laws, scriptures)?
More like an extension based off of the specs that is less likely to only lead to protocol decay and whack-a-mole development. On the basis that the current specs are too flexible. #ActivityPub is de facto a protocol framework. An extension can be the protocol with more rigor, and help ease solution development on top of that with yet more composable extensions.
W3C specs give us conceptually 'addressible actors that exchange activities with object payload'. That's powerful.
If you have a fediverse account, you can quote this note from your own instance. Search https://social.coop/users/smallcircles/statuses/115400116538639055 on your instance and quote it. (Note that quoting is not supported in Mastodon.)