@nopatience seems like it's pretty much doing what it was designed to do, so no need to update it.
On the other hand, updates that would change what it was designed to do would probably break backwards compatibility.
I have serious criticisms of AP, but at the end of the day if one doesn't agree with the goals and designs of the standard they should probably go find a different standard that better fits their application.
@volkris
While I would like to share your optimism about getting ActivityPub correct from the get go.
There most definitely is room for improvements across the board.
I can imagine some sort of meta-layer syncheonization for various statuses. Replies to threads you are involved in, number of "boosts" and likes etc.
Evolving ActivityStreams and collections.
And FYI, i have many minutes of reading the spec, almost an expert by now ;)