A friend of mine just posited a theory why Witcher 3 has better facial animations than Andromeda.

...slider faces.

Think about it. Witcher 3 just has to get one set of faces to work properly, not a bunch of possible faces that can be any number of settings. I'm betting most of their NPCs are made by moving around sliders (after all, why not use that facial construction technique for your NPCs? Seems to me like it'd save on money and time.)

It's just a theory, but it does seem reasonable to me.