Our work with elite athletes serves as the proving grounds for our methods. Most people don’t play professional sports. But if our methods help athletes at the highest levels, they can work for anyone.
Yeah, it’s not often considered that having the heels raised can help bypass hip ROM issues as well to a degree.
I don’t know if his approach to patterning the squat has changed since Athletic Body in Balance, but Gray Cook recommended using a heel-raised squat when beginning to pattern good squat movement for those unable to achieve the desired deep squat position without lots of compensation. In conjunction with this, the individual would be working on mobility, so the board is not simply being used as a crutch.