I agree with your points, in particular your concern about duplication. I really hope that eventually, with more development, things like grouping communities on the user-end and even merging them on the server-end would be possible.

With organisation, I could see the mods of similar communities coordinating to redirect traffic to a “main” one, or even creating a distinct instance like how ststrek.website has.

It’s a working experiment in decentralized governance, so we all need to think of ourselves as citizens of lemmy/the fediverse and members of communities.

My instance admin is trying to govern via consensus, I’m enthusiastic and interested, if a little nervous it won’t work well.