The first was the idea that Daito ryu was the soul contributer and influence of Aikido.
I haven't heard that. What I have heard is that the empty hand techniques of Aikido can be traced exactly back to .... Guess what? Daito ryu. So far, no evidence to the contrary has been posted. Stan Pranin has done a great deal of research in this area...the time for debate is basically over. There are many many different influences on the weapons work, some from Ueshiba's time, some since then. But the empty hand techniques; ikkajo, nikkajo, sankajo, yonkajo, shihonage...these are clearly from the Daito ryu syllibus...there is no factual way to deny it.