would it not be possible, not sure how complicated it would be though to have the ability to add different repos, such as they do in Kodi. You have the official one, then people can add the WP one if they want and developers could develop their own repos, with plugins/themes in etc, which could be added.
Developers and/or coders could choose which repos added them.
This could put less pressure on developing a large repo for all the plugins and themes with the developers and coders already onboard, being able to concentrate on a few core plugins/options initially and could also lead to some innovation from others.