AIKI- the goal,
Do you understand aiki as to connect, to concentrate one's own ki? This seems to be more the understanding of aiki in Daito ryu, I think? And to me it seems this understanding can be often found in the koryu.
O Sensei switched this understanding of aiki to connect one's own ki with that of the attacker.
Were he was a musician, Aikido would be music to connect with Ki and we'd all be practicing Zen music,
Ueshiba didn't do Zen.
But the Kotodama O Sensei did deals with sounds and tones.