I am struck by the collapse of the ankles in the picture. We had a patient in our office who could not flatten the ankle as in the picture. She did not continue dancing because of the lack of motion required to look like the rest of the dancers. The collapse of the medial side of the foot may look good for this activity, but ouch! Consider the bias of one leg forward and the tightness in the joint capsule. Maybe posterior mobilization to seat the hip in a better position to stretch the hips.
Tim Daley PT