Was The G9 Omission of "Brow Inner Down" Morph Purposeful or A Miss?

Moving the inner brows up and down is a very common facial movement and I am confused as to why G9 has a Brow Inner Up morph but not a *Brown Inner Down one.  In order to make them go down, I have to manually go in and change the paramters of Brow Inner Up, Brow Inner Up Right, and Brow Inner Up Left.  Can someone please explain how this makes sense? Perhaps I'm missing a totally seperate morph that would cover this use.  And yes I'm aware Brow Squeeze but it doesn't atually make them go down that much.