Opening this up further, the map server scanning maps will get interesting.
We have a 'map' folder in each map today because of legacy reasons and how the maps used to be packaged. AFAIK this is no longer needed.
I'm thinking to bulk update the existing maps to remove this folder and move all content up by one.
The maps-server will see a lot of action pretty soon and the description of map instead of being in 'triplea-maps.yaml' will instead be found in the map repository in a specially named 'description.html' file. Similar for the preview image being 'preview.png' For all existing maps I think the map-admin team can help ensure those changes happen.