I seem to have made you write much more than you originally did. But I should add two more supplementary comments on the earlier post. The comments really go hand in hand.
(a) Since we cannot find out much about M Ueshiba's philosophical / cosmological views from his writings, or from his disciples, we shall probably never know what he really thought about the world. But we do know what he did, how he lived his life. I know that this also depends on hearsay, but M Ueshiba did not appear to have any major problems or angst about the effectiveness of aikido, whether in earlier or later incarnations.
(b) Thus the core techniques have to be continuously refined. In my opinion there will always be a tension between e.g., Aikikai reluctance to deviate from some norm of what is 'classical' and the need to subject this core to constant testing.