Triss, Geralt, The Wild Hunt, and maybe more all looked better in pre-release footage so yeah I do complain about those lol. It's generally very good though, NPCs look better than main characters from other WRPGs.
This is called subsurface scattering I think.
Only for info
Its unlikely to be subsurface scattering (SSS).While SSS has been around fopr a while, I think become mainstream since 2005-2006 in CG world. SSS realtime is still pretty early in game development. I think UE4 has SSS material only in recent version (need to check)
In any case, you do not use SSS on clothes, metals & hair. SSS is use mainly in translucence meshes like skin or candles.