1) It’d be nice if certain posts could be prevented from being widely distributed. For example, a reply distributed to another blog or Twitter doesn’t make sense to post to Mastodon/Fediverse since the quoted source itself isn’t included.
2) It needs a few more options for how posts are formatted. I don’t think it makes sense to include a link back to the source on simple statuses, though it does make sense for articles.
3) Now that the Friends plugin can send a follow request to an added subscription, it’d be great to have a list of follows as well.