This is really just Bisq and RoboSats onto an open protocol and an open liquidity pool. Instead of pure P2P it becomes a Nostr relay based architecture. The problem with pure P2P is it requires the peers to be always on - this makes mobile usage impossible.

The problem Nostr solved is allowing relays to just be a dumb information hub as so things won’t be centralized, but still allow clients to come on only when the user demands - which is critical for mobile usage.