Personally I think those 3 you just mention pretty much cover it. I find 'year' less useful as a tweak for a few reasons;

1) cddb and other online tag information don't always have accurate 'year' tags, so not all my tracks have the year. OK, so that is my laziness, but still.
2) Compilations and mix albums usually suffer from the 'year' being tagged as year of compilation.
3) I rarely find that I want to listen to more or less music from the same year. Maybe more or less from the same 'Era', but I guess that's too fuzzy to tweak.


OTOH, I often find myself (not) in the mood for a particular artist, genre, or (to a lesser extent) album..