[rampant supposition] I believe that Ueshiba really wanted Aikido to spread world wide. It's possible that he realized that if Aikido became a koryu like art that its dissemination would always remain limited and secretive. To prevent that from happening he purposely made sure that no one got the full monte as he understood it. That is to say the fracturing of Usehiba's Aikido into the convoluted tree of interpretations that exists today was planned from the outset in order to appeal to the widest possible audience. [/rampant supposition]