I’d like to quickly bring up the proposal for Core Contributors to propose logical repo “groupings” (groups that it’d be common for other Core Contributors to apply to, such as a particular set of XBlocks, or a feature repo + associated libraries).
Repo groupings sounds like a good idea to me. 
The analytics ones are an obvious start, as you’ve noted.
Would it make sense for CC repo groups that include any MFEs to include paragon, frontend-component-header, and frontend-component-footer too? And grouping XBlock and xblock-utils with any CC repo group that includes a supported XBlock repo? Changes to these foundational repos may affect the dependent repos, and so CCs could weigh in on changes there, plus they’d have dev environments already set up for testing.