And on that subject, I've never really understood the difference between the sorting options in the Rules... dialog and the sorting options on individual categories/fields (on that Edit button). Is it the case that the Rules dialog sorts the actuay files after you've drilled down far enough to no longer have container levels whereas the categories sort is as it says, it sorts the container levels?
When you edit a field (Album in this example), you can change the sort method to ascending and descending for that view only (Album). When you go to rules for display, you can add several different fields to sort on, like year, artist, or anything else you'd like. You can create a similar sort hierarchy as you can in every other view (sort first by this, then by that, and finally by that).
I may not have read carefully at first, but now I understand the OP wants something like a button to switch between different sorting schemes, I don't think that is possible, you create a new level for each sorting method though:
Audio
- Genre
-- Sorted by Artist
-- Sorted by Album
-- Sorted by Year
- Artist
-- Sorted by Album
-- Sorted by Genre
-- Sorted by Year
- Etc
-- Etc
Maybe someone else has a way I'm not aware of but this would the only way I know.