Smooth Interpolation in "Compute Head Movement from Speech"

My request is to add a toggle to turn on smooth interpolation on head movements set by “Compute Head Movement from Speech.” The default seems to be “Pose-to-pose” movement. And adjusting the percentage of pose-to-pose in the “Face” puppet track behaviors doesn’t affect the movements added by “Compute Head Movement from Speech” even though other behaviors do. For example, I can adjust the eyebrow strength or head tilt strength on that movement.

It would be nice to either have a toggle for that smooth movement or for the “pose-to-pose movement” setting to actually work.