There’s nothing we can do about it, it’s all up to Nvidia. No one other has access to the libraries and FaceWorks source code.
You have a few alternatives right now: There is a material package by C-Media on the Marketplace which includes a skin shader (one of the two advanced material packages,you have to look which one it is, I can’t remember) + JBaldwin released an Eye shader (more in his thread: https://forums.unrealengine/showthread.php?73765-Official-F-M-Station-Content-amp-Announcements). You could also look into the Kite Demo assets, there should be a skin and eye shader too.