I have been conforming clothes and shoes to LF2. I tried the re-rigging method proposed by @hborre above, and that works great for various garments, but not for shoes. It may be my lack of knowledge, but following the procedure, and adding the whole shoe as a constrained group, still creates a result which loses its shape, and where the mesh breaks apart.

So I was interested to see @RobZana's rough and tumble method described above. I tried it, and it actually works. I have conformed LF1 shoes and even some V4 shoes to LF2. 

This is my method then: Clothes transformed and re-rigged. Shoes morph-brushed and tweaked.

I can post some images if there is interest.