You aren't able to dynamically generate the UV set based on the morph. (An interesting concept perhaps you should suggest it to DAZ.) However you can create a Morph for the clothing that covers the morph for Genesis, which will give you a different distribution of the polys and give you less UV distortion that what you get from the automatic morph projection.

No, that isn't what I'm trying to accomplish. My concerns were more or less addressed in vintorix's answer. I was thinking in terms of modeling around the generic base shape, but instead of making a default set of UVs that is optimized for the generic body shape, create a default set of UV's that are optimized for a curvier female.

But vintorix's response basically gave me my answer .. you don't model the female clothing around the default body shape, but instead model it around the female shape. That would address the concerns I raised here.