Well I personally like nostros as you probably know, but it's because it shows you what relays notes came from and then you add or remove relays based on whether you want to see those people or not.

So I like the whole use the relays your friends use and prune the ones the spammers use approach personally, but I can see the value in your design so I'll try it.

I think it is kinda designed around how most people actually expect to use nostr anyway.