I made some steps to explore that route:

• make base zero geometry for clothing
• drape the garment at key joint rotation poses (intermediate points not necessarily figure JCM points) This can be Marvelous Designer, Cloth room, or ZBrush or whatever) to determine target geometry.
• rig garment base with unimesh geometry and basic joint parameters.
• for each elementary joint motion for each vertex determine best fitting values of rotation weight and bulge to resemble the target and insert in joint parameters
• with updated rig repeat previous step to verify and seek improvement. If no improvement of significance found resemblance is as good as rig bending will bring you so stick with that.
• determine JCM deltas as difference between target and rigged garment. Axial motions will remain to be JCM. Poser rigging does not allow for axial effects. One could of course introduce harmonics of the joint angles to improve the fit.

I got as far as the first three bullet points. Rest will likely have to wait for long rainy days/night after my retirement, provided house redecoration done, the shed fixed, and some more. LOL! Result will be MORE JCM's, but generated automatically.