Another interesting metric to try to capture would be issue resolution. A lot of time you might have a very decisive issue in Github where the developers basically piss off a lot of their users. I don't think that's generally a good metric to promote as a top level metric obviously, but it would be interesting way to slice and dice projects.

But that analysis could look for thumbs up or fireworks or other Happy reaction emoji vs negative feedback emoji tied to the replies of people on the team.

Yes, this goes back to criticizing open source maintainers for not doing what everyone wants - so perhaps that kind of metric would only be enabled on sponsor backed repos.