Hi!
Sorry if I worded the title strangely!
I’ve always thought that it would be nice to have the option of having some facial expressions that are separate from the full-body animations, like being able to laugh while walking or an eye roll while on the phone.
I know that some expressions are dependent on the animation to make sense and vice-versa, but I think the ability to mix and match the simpler ones would allow for a lot of creativity when it comes to directing. 
Thank you! 