I think the last out of the box asymmetry morph group I saw in a figure was with the Tomo conforming head for V4 by MayaX... have to admit I'm woefully behind on current figures, though. I imagine that asymmetry morphs would be of most use to those who utilize Poser for animations with an emphasis on subtlety of expression, probably a small minority. Personally, I welcome any feature included with a figure that increases it's... ummm, idiosyncrasy. Otherwise, a minor custom morph or the split morph function suffices.

:)