Most of your points are valid. That's why I'm suggesting Mozilla support it. It would be a lot less "shoddy" if someone shepherded it. I think it is the right idea.
The last point is only true because they aren't recognized, which recognition would immediately fix, therefore it is moot.
My concern would be that it's enough of a mess that Mozilla would have an easier time building an equivalent project from the ground up than reshaping this one into something reasonable.
I could be convinced that a community-based restructuring of DNS could be for the better. But I don't think that OpenNIC is the right project to base that around. The technical aspects of what they've built are not complicated, and much of that would need to be changed anyway to operate at scale; good governance is a lot harder to build.
The last point is only true because they aren't recognized, which recognition would immediately fix, therefore it is moot.