Kit, I continue to practice what I retained from Shinto Yoshin Ryu years ago - in other words, I have not been able to hook up with a valid SYR instructor since mine left town. What I have retained I have incorporated into what I teach. Thus what I teach is ecclectic; I do not want to misrepresent that part of my training. However, I do remember quite a bit, and I do work out at times with other classical jujutsu folks here and there (through my affiliation with the USJJF and the USJA), so I am comfortable making a judgement based upon (1) an extrapolation of what I have personally experience; and (2) common sense stemming from the battlefield precedent of original jujutsu.
I am simple-minded , thus the overlap of these arts for me, as they apply to combatives/SD/DT, is very simple. There is a universal principle of efficiency that should apply. This does not mean you never have to use forceful action - it only means you utilize that force efficiently and economically.
Another universal principle is adaptability. The techniques, although based upon the same universal principles, have to adapt to changing circumstances and different combat scenarios.
More importantly however is the need for the tactics to conform with the "rules" of the playing field. This is what should cause our training to be goal-oriented, whenever we train for self-defense, combatives, or DT. Different encounters will have different goals. If I want to apprehend someone using minimal level of force as defined by whatever use-of-force matrix legally applies, the other person's actions dictate what tactics and techniques I employ. Thus my training has to cover all of those use-of-foce contingencies. If my goal is to seek out the enemy, kill him and not take prisoners, my training has just become MUCH simpler because I have narrowed the goal, thus narrowing the tactics and techniques.
Before all of this can come together, though, the students have to train in the basics so they can come to learn, understand, and eventually own the underlying principles. After that happens then we start looking at tactics. This is one of the reasons why the MACP is widely misunderstood. Many people look at Level 1 of this program and conclude the whole program is crap because it does not address the important variables, such as how to be effective while carrying a rifle, wearing body armor and Kevlar helmet, LBV, etc. What they don't understand is that Level 1 is designed to teach the basics to the troops, helping them to come into contact with the principles that are paramount to make the higher-level skillsets (found in Levels 2 and 3) work effectively in combat (although there are certainly some combat-applicable traits of Level 1 as well).
The training precepts I have outlined can be a universal standard for any art that is taught for practical application uses. This is what will bind these arts together.
When I look at the pictures in the aforementioned article, I am trying to decide if I see efficiency through good form, combined with a logical manipulation of the affected limb being attacked. I cannot imagine that classical, battlefield jujutsu would be inefficient and lack good form. We also know that the human body moves in certain ways, and that some ways of affecting that movement are more efficient than other ways. I CAN do the udegarami as shown in the picture, but why would I if there is a better angle to attack with that lock from? I also know that despite what angle I attack from, my base better be good. What good is a strong technique thrown from a weak foundation?
Last, I strongly agree wtih you that kata combined with randori/jiyugumite is essential for shortening the learning curve for combative-minded people.
I hope this did not come across as drooling, demented rambling!
Jeff Cook