Dan very clearly bifurcated Ueshiba's pursuits between budo and spiritual stuff, and stated that the spiritual stuff is useless to the attainment of the IS/IP/Aiki/Glow. I think that misses the point in a similar manner to Mark Murray's original post which characterizes Ueshiba, Kodo, Takeda, and Sagawa together as men who trained assiduously for "martial power" to the exclusion of many other things.
I think that you'd need to speak to Dan again about that.
In any case, that those folks trained for "martial power" to the exclusion of many other things is hard to dispute. Are you really arguing that this was not the case?
I'd agree that "the spiritual stuff is useless to the attainment of the IS/IP/Aiki/Glow" - that doesn't mean that things don't go the other way.
The engine of internal training, if you understand what we're doing, is also the engine that connects and powers all of the other stuff.
It's not a new model, and it didn't originate with Ueshiba.