I remember hearing that CFD might be linked to foot problems, though I can't remember anything else besides Mike Mew suggesting adding space in between the toes by wearing a tool that would space them out.
I recently emailed some questions to someone who works on the Crane facepulling device and also asked if there could be a reason why I haven't seen any results after 2.5 years, no matter what I do. She was replying with her phone and obviously has better things to do anyway, so I get why it was a concise answer, but she said my skull deficiency could possibly be from my hips and feet, and to see a foot doctor.
This piqued my interest a bit because when I go for walks, I'm constantly shifting to one side feeling like I'm walking at an angle and constantly have to reorient myself to properly walk with my weight on both legs. I know everything in the body is a chain and not isolated, but what is the logic of feet and hips relating to CFD, if any has been mentioned before?
I think you sound like a candidate for Rolfing.
Although it may be impossible to determine what is the chicken and what is the egg, achieving a certain level of feet fitness is important - perhaps even crucial - for achieving facial symmetry. The soles of your feet are starting point to several postural chains that travel up your legs to the hips and so on. If your feet are slacking, you will not be able to balance your hips and align them with the spine & skull. Fixing existing facial asymmetry becomes thus nearly impossible.
Practice the motion of grabbing with your feet. Curl toes inwards hard and rotate your ankles to various directions. The main goal is to get your feet to spasm, which is a sign of the muscle regaining conscious control. I have been training my feet for a year now and there are still spasms occurring every now and then. Often when I progress elsewhere in the body, I have to go back and retrain my feet and then re-work my way up until all the previous progress is fully linked together. In my opinion starting from Mewing / upper end of the spine is not ideal in all cases.