Try dividing up services by vegas teams
https://trac.torproject.org/projects/tor/wiki/org/operations/Infrastructure has a big list called "user facing services", and it's a jumble of things that are more clearly in particular Vegas teams (help.tp.o, exonerator.tp.o, etc) and things that are needed by multiple teams (trac.tp.o), and things that don't really map to any team (jabber.tp.o).
We could learn something useful about our situation by trying to annotate the services list by which Vegas team cares about each.
I can imagine that for the services that have multiple teams caring about them, we could pick a primary team to lead the care-and-feeding of the service.
I could also imagine making a new 'infrastructure' team or the like, for the services that would otherwise be homeless. That's kind of a sad outcome, because it could easily turn into a graveyard for ignored services. But it might still be the best proposal so far.