This was a great commentary by Aikido research/historian/Sensei Stanley Pranin. Tony Dismukes brought up some of these same points (maybe from a slightly different perspective) as Sensei Pranin. Must read. Who changed Aikido after the war and what were their motives? by Stanley Pranin "As the Founder’s son, he was expected to carry on in his father’s footsteps and manage the course of the development of aikido. In terms of martial ability, he was inexperienced and his temperment such that he rejected a rigorous training model in favor of gentler forms of practice that more closely resembled a cardiovascular exercise system."