"Skirts usually don't have thigh or shin groups."

This is the Edwardian Riding Suit from Poserworld:

It has a hip, lThigh and rThigh groups and fully conforms to Vickys thighs AND shins.

Personally I prefer skirts with morphs like those of Serge Marck as they give an incredible flexibility.

I tweak Poses so often till Im happy so waiting for dynamic clothing to adapt everytime I change something just takes way too long for me.
But dynamics are a great way to add morphs to a conforming clothing item.

But as you can see by this suit, even a long skirt can be made as a fully conforming cloth and still adapt to a reasonable amount of poses without breaking.

stahlratte