I honestly don't believe O'Sensei was thinking about dance when he practiced, talked or wrote about Aikido. Looking back on this thread, it appears the OP may have touched on an answer to what can be inferred from O'Sensei's statement "there is no enemy opponent or other in aikido, there is not even a partner"

If that is the case then one question that comes to mind is which Senseis are teaching or doing Osensei's metaphysics?