I can create a body motion with facial animation in iC8 and then use it in CC4 but that doesn't help because I'm trying to create and test custom facial expressions.

So this is strange that we can use the facial editor with an existing animation in iC8 but not in CC4.

I'm using spring effects on the tongue for example and need to see how the movement allows it to swing.

I'm also wanting to test it with soft body physics with the tongue because I believe using cloth vs cloth setting can uniquely restrain the tongue within the lips, my character's tongue is completely attached as part of the existing mesh and may offer better compatibility.

I think a handy fix for this is to quickly be able to use Face Puppet while in Expression
Facial Profile Editor to manually shake the head.

Not sure if this is a bug, but if I already have an animation to test and i want to see it working with the facial editor, it unloads the existing animation.