My interests are purely to evolve ActivityPub to the point that I don't **require** an alternate protocol to do all the basic things I've been doing in the fediverse for the last decade. I would like to do it all in ActivityPub. Circles, groups (public, moderated, and private), rich granular permissions including media and files, single sign-on across the network -- so we don't get asked who we are to comment on a post or follow somebody or view private media on a remote site, and nomadic identity with live data sync to all identity instances. Rich multi-media with no artificial limits. Encryption when appropriate. Oh, and intact threaded conversations at all nodes.
We have this today (if we turn off ActivityPub). Anything less is a regression.