George S. Ledyard
The single most devastating thing a father can say to a son is "I am disappointed in you". Sons will kill themselves trying to make their father's proud. What kind of pressure do you think Kisshomaru Ueshiba was under with a father who was one of the great geniuses of modern Japanese martial arts, who created a brand new art, with a brand new vision?
His father complimented him exactly once - upon the completion of the new hombu dojo.
FWIW, I think that Kisshomaru had more "stuff" than he is generally credited with, but that he purposely set up a structure that would not transmit it - at least, in which it would not be transmitted by hombu. Hombu, in this paradigm, is kind of a blank - but it leaves space for people under hombu to do the real work.
In that sense, I think that he was successful, since that's probably the only kind of organization that could realistically survive as an umbrella. On the other hand, I think that it is important to realize that this setup means that the King has no clothes - they have to tailor things themselves.