Request for groups: Different quick buttons for setting the list. These would be like "none", "all", "default", and "add current enabled". Current enabled would take all the add-ons that are currently enabled, and make sure that they enabled in the group. This way you could easily take a server that was fun to host and transform it into a group.
Also, on the group page "edit" and "remove" buttons would be more descriptive than + and - buttons.