To me Phase 1 is just a place to discuss about an idea. Is the Idea is pretty much formed, I dont’t see a reason why it can’t be immediately be taken to Phase 2, for signalling.
Howver, I would favor a % of consensus over acceptance for Phase 2 (not 3) .
SO that signalling actually signals a real consensus. 51 vs 49% doesn’t represent the will of the community, so addding a required minimum % of agreement for a Phase 2 to be valid, sounds lioke a more interesting idea.