Don't have the time right now to address the questions. But, I want to clear up my point of view. I'm not arguing that Daito ryu was hidden or covered up at all. Yes, it's there in the books. My point is that Daito ryu (and Takeda) was so downplayed and marginalized that both were never shown to be the major factor in Ueshiba's training.
Yes, I am aware of this. However, I think that suggestions of a cover-up and conspiracy become much harder to demonstrate.
To me, talk of a conspiracy / cover-up suggests that someone, Kisshomaru Ueshiba, for example, actually knew all the time that his father's Daito-ryu training was really far, far more important than his connections with Omoto, but he deliberately chose to downplay or suppress the former, in order that people would (erroneously) believe that the latter was more important: in other words, systematic lying took place on a major scale.
I do not believe that such a serious moral lapse can be demonstrated, even from Stanley Pranin's research.
In your post, you mention Daito-ryu and Takeda as the
major factor, rather than a
major factor (which is what I myself believe). So I think you need to show more evidence than you have done so far.