I've been thinking about this for the last couple days, and I agree. There's even the problem of duplicate "subs* popping up on other instances. Federation as it currently is seems to be something that works a lot better with a Twitter alternative than a Reddit one. There's probably some tweaks that can be done to make it a more unified experience. I have some ideas, but I don't think they'd work.

These are my suggestions, and I'm sure there's a reason why they haven't been done.

• Break down the Lemmy/Kbin Federation further. Each sub is it's own instance, this makes it cheaper for people to run their own instances, instead of running a full blown site with several subs. This will also allow for replacements for subs to be created easily, and removes the chance for another Spez to show up.
• Make the user account an instance. Each individual post or comment is made to the user profile/instance, but is copied or reflected to the sub it is posted to. If the user account is deleted, a signal is sent to each server that the user has deleted their profile, and to remove each comment/post with the users unique ID.
• Make each sub lowercase and remove all white space, so that individual "comic" instances, or "funny" instances appear together by default.