So, I finally stopped slacking on this. After reviewing the discussion, the decisions I took were:
- Add a RG-RG rel, since it’s the simplest option and still works in a large majority of cases. If more is needed, it can be requested later
- Remove the “A release containing two albums and/or EPs.” entry from the RG guideline
- Let Box Set as a type off the table for now, since there’s nothing anywhere near consensus about it and “Compilation” is not wrong even if it could be more specific.