It is useful. I literally have to use the global section instead of my home feed to see and follow my friends’ posts because they get buried in my home feed. I do this by turning off all relays except for the ones my friends are using and switching between various ones of those to see different groups of people.

Topical relays are very useful. 

I have no idea what “first class relays” are maybe you can explain… 

 when I say first class relay I think of something like discord servers. where you click on a specific relay to show all the notes in the relay, and when you post, that post gets sent only to that relay.

it's different than the current model that damus currently uses. 

 That’s what I’m asking for, and how I currently use the global feed (for read only) but wish the home feed worked that way. Just add the same wine glass funnel icon thing at the top and let me turn them on and off!