Hey again. I have been thinking about this for a while. I have one idea.
If i can read the iphone blendshape values in unreal live, and base on if its 0.0 or 1 - could swap out a texture on the face. I think this could work but I need to do a bit more research in out this could work as im not really good at blue printing. Hopefully some here could lend a hand?
M