After thinking about an issue involving shape keying with bones. My big question is, to everyone here, what if we just switch entirely in moving the face with facial-posing bones. I've always ran into issues animating faces with shape-keys anyways, and it usually ends up a bit off! What if we have free reign to animate the face however we want by just having facial bones, and have a separate pose library set up for just that? That way, when this ever gets to a point of animation, just click on a pose in a facial pose library, key it in, and transition from facial expression to facial expressions in the timeline from our pose library.