One thing i’ve learnt about using any hairstyle on Genesis (even ones made for Genesis) is that they are prone to distortion. Basically, every time you use a face morph such as blinking, jaw movement, or various facial adjustment morphs, the hair will try and “fit” those morphs even though it shouldn’t.
I recommend turning on “View Hidden Properties”, view the morphs being currently used, and manually 0 any facial morphs it shouldn’t be using. This often helps to clean it up a bit. If there’s still some minor distortion, the smoothing modifier should help.
They should really add an option to force items like hairstyles to ignore all facial morphs.
EDIT: To reiterate, this distortion would happen anyway even if someone were to make a Genesis version of the hair. It happens to all close-fitting hairstyles on Genesis.