I think one needs to understand the workings of ki, not necessarily talk about it all the time in the dojo to understand Aikido.
"Without Ki there is no Aikido" does not mean "Without talking about ki in class there is no Aikido.:
I think Ueshiba M. (think being the operative word here
) was the one who said that one did not need to focus specifically on cultivating ki in doing Aikido, as it's cultivation was inherent in the practice of the techniques. Of course I could be wrong. Have met sensei who could talk for hours about ki, but had terrible execution of techinque for all their talk.
Got
?
Just my 2 cents.
L.C.