I finally found how to get awesome lather out of my VDH glycerine. At first when I built it I would put about a tablespoon and a half of water in my mug and build lather in the mug after having loaded my brush in my soap. The lather lubricated but would dry out on my face (though not in the mug), and was not all that thick. Today I did the same thing I always do and loaded the brush with soap and built in a mug, but after building in the mug, I took the "built" lather and put some of it on my face. Swirling the lather which (I thought) was built all the sudden made it explode on my face! I guess I need to build this stuff twice, once in the mug and once on my face. The nice thing is the semi concentrated lather in the mug can be added to the brush and swirled on the face again for multiple passes!
Oh and I also added less water this time... but I think the double build helped a lot too. My face feels awesome!