We're rigging and animating about a dozen custom characters through Character Creator and iClone at the studio I work at, and I've grown pretty fond of the Facial Profile Editor and how quick and easy it is to update and create blendshapes in a variety of programs. However, I can tell there still needs to be a good amount of clean up on some shapes when I run any of the facial test animations, but there isn't a way to accurately tell which shapes are being activated during the animation.
iClone has something like this in the Tracking Data Inspector portion of Live Face, which I included a screenshot of. If something like this could be in Character Creator, I think that would really help with isolating and cleaning up blend shapes, allowing for a much smoother workflow.