I believe that Endo sensei developed very high level of understanding of aikido, but he doesn't know how to teach it efficiently.
I haven't attended the seminar but instaed I know:
You can find everything you did in that two hour class on one of the three basic DVDs (one of them shows his kihon waza) and on one of his Seminar DVDs.
With explanations, preparatory exercises, alternatives, ways to techniques, showing common mistakes or difficulties and and and.
One of the things his scholars like is his precices and efficient way of teaching.
Shouldn't call it aikido anymore ...?
Do you know Endo's technique, his kihon waza?
Have you ever seen a dan-examination held by Endo?
May I ask which style of Aikido you are doing?