Maybe even allow instances to generate their own community groups you could tap into? So if I'm on lemmy.world, I could see a proposed "gaming" group that lumps together local gaming communities with cherry picked communities from other instances. I think a wealth of options here will be key. Let me see the group, and see what community it is originally from if I want. And then if I notice that one community keeps posting nonsense, allow me to block just that community (like I can now) from the group.

I'm also waiting to be able to block whole instances, but I believe that will come.