I personally don't weigh in on bitcoin related PRs. But as to the general question, if there are multiple compatible implementations then IMHO it should be merged.
I’m sad https://github.com/nostr-protocol/nips/pull/851 never got merged. We built a nostr.wine NWC service that relied on this improved onboarding flow in December of 2023. At the time Mutiny was leading the effort.
I don’t understand why it wasn’t merged then when we had 4 working implementations. It is the only reasonable NWC on-boarding flow I’ve seen for services (like nostr.wine).
Discussion
It's hard to get anything merged, anymore.