I think soundtrack material should be put into the same RG’s more often, as per my comments here:
Even when tracks are different, I think the question should be ‘does this help users find things/navigate’ (I’m just talking about soundtracks here).
Grouping samplers and game rips with different tracklists but that people would nonetheless expect to see together seems logical to me, but I understand it’s not in line with current guidelines so I haven’t pushed any edits like that through.