Well, MysticDaniel, here's a test of how the shader handles V4 Elite Katie.  Some adjustments had to be made since the original shader was designed for texture maps and hair trans maps only (no external spec or bump/displacement maps), but in essence, it's the same.  I also had to use an HSV node to weaken the red tint of the maps.  I read somewhere that the base color of human skin is actually pale green and that the peach/pink hue that we actually see comes mostly from SSS in the deeper layers.  Most commercial sets don't take this into account.  This hue adjustment might result in some discoloration of the lips, but that can easily be masked out (especially if I make my lips mask freely available).