I've been creating blend shapes for my characters in CC5, and I've come up with a suggestion that I think will definitely speed up workflow for users.
Could you please add in an 'open mouth' button as an option, so when you go to edit the sliders for both Teeth and Tongue - you can do it easily, without having to find a work-around, like using the open jaw slider.
Seems to me this has been missed or not thought about.