This would be amazing to have!
There are several products in Daz that are essentially meshes not part of the true Genesis anatomy, which can conform in Daz, but do not conform real-time on a CC3 if brought into Transformer.
One that comes to mind is Eyebrows, which come in but are static and don't move with Face Morphs when the character expression changes in CC3, and then also some body wearables , which can't be transferred in because Transformer can recognize the extra mesh as a part of the anatomy and doesn't see it as clothing either.

Daz isn't real time so it has the luxury of computing a conformed state per frame for such meshes.  But in a realtime setting, these meshes just are frozen, and a weight map can't really conform it true to the underlying mesh.