ordering vgm does have issues too, like if the DLC tracks get mixed in with the non-DLC tracks (i.e. they get slotted in at position 3 of a list of 20 in the menu, for instance), or they’re directly included from another game, which takes them out of the “part of” ordering (been having this specific issue with the Smash Bros Brawl soundtrack, since it includes recordings from Melee, the previous game)
actually, you mentioned series, perhaps we could use those if we want to capture the order of a sound test menu? instead of trying to fit it into works, that is. it would at least take care of the Part of/Included in split mentioned above. I don’t know that I’d personally do much editing like this, as I think creating soundtrack works is prolly more important (and I enjoy doing them too), but I don’t think I’d be against doing this either
on that Nintendo Music example, I’m not sure if those playlists are really in the scope of MusicBrainz… we have these entered by game as soundtrack releases, for instance like this, but since some of the playlists can change at any time (like playlists for series or characters), I think that might be controversial, at least (see previous forum discussions here and there)
the jingles and sound effects should probably be a part of the soundtrack work too, since they are often musical, can be used in music, and are part of the game. this is another reason I’m a bit hesitant to use sub-soundtrack works, since (at least while editing the Smash Bros series) those are often excluded from the sound test menu (or in a seperate menu just for sounds, in the case of some games)