Agree. In the future, determining what goes in each filter and in each sub and to which relay can be fully automated. The UI just subscribes to an extended definition of the current filter spec (more like the Custom Feeds from nostr:nprofile1qqsf03c2gsmx5ef4c9zmxvlew04gdh7u94afnknp33qvv3c94kvwxgspr3mhxue69uhksmmyd33x7epwvdhhyctrd3jjuar0dak8xtcppemhxue69uhkummn9ekx7mp0qy2hwumn8ghj7un9d3shjtnyv9kh2uewd9hj7208x3z) and the merging algo can figure everything out.  

 Yeah, this idea is basically the flipside of subscription merging