I export t-pose character to unreal via iclone / cc3 setup.  Then I export animated character. Everything imports into unreal except the face key animation. Not sure what I'm doing wrong.

I guess you forgot to tick "Import Morph Targets" when you imported the Character.
So there is a Character in UE that has no Morph Targets that can be driven.
You have to tick it also when you import animation.