I know we are getting philosophical here but....
I am not sure you can develop KI, it already is there. Again, it is probably semantics.
Anymore, I am not so sure about the whole compliant uke thing being necessary. Sure you have to set some parameters to control things, but do we set them too rigidly sometimes in aikido?
I think uke is only responsible for an initial, sound, attack...he does not have to do anything other than offer an honest attack, he doesn't need to follow or anything else. He goes with nage only to continue to improve his position of attack, or to save his ass from getting dumped...it should be very, very tactical.
Speed comes into play as another dynamic. We can slow things down or speed them up. While it does affect the emotion and timing of the attack...theorectically it should not have bearing on the tactical soundness from a principle standpoint.
I think dealing with speed is what we are really addressing most of the time and the impact it has on the realationship. There are two ends of the stick we can work on....slow where we have the time to develop good habits and work on principles. Fast, where we work on timing and all the mistakes, emotions and what not that are caused by that stressor.
should not have anything to do with level of compliance/non-compliance.
When you talk about KI and being rooted in a tense body, it sounds to me as if you believe it is a separate and distinct thing, to be developed or produced. I tend to not separate KI from anything. It is always there and always is flowing...it is just the relationship to yours to someone else and the environment.
May seem lilke a small thing, but I don't think so.
You can let go of tension and standthere there and get clocked! Or let uke throw you around like a rag doll. don't think it is so much the letting go of tension and relaxing, as much as it is directing your tension etc in the appropriate time, distance, and space.
Its as if you talk about tension (stress) being a bad thing. It is niether bad nor good....it can simply be directed in the wrong way.
KI is sometimes described as energy. It can come in many forms, physical, mental, and spiritual. It is conceptual I thnk. It can be in the form of Stress, Anger, muscular tension, fear, movement...all those things. As an form of energy...it can neither be created or destroyed, it is only transferred from one object to another and is always going toward balance.
To me if you can build up and store KI.....it would be as body fat as it is the body's way of storing excess energy that we do not need !
Right now I have more KI than I need...want some?