To clarify for anyone who might see this here- I'm actually suggesting that these profiles are merely extensions of local relays. While it sounds nice to have full functionality, I would like the idea to stand without consideration for intricate protocol-level interaction. So, dm relays would need to be specified under the home profile. This would double as in-house custom feeds without the need for publishing all feed lists to Nostr.
I did however fail to address notifications.
If that is suitable, then perhaps it could aim to become a more complete form of profiles. But, this is where I see multiple npubs taking precedent. The home profile is king of the npub.