I agree with you completely both on Master Dillman and Dr. Yang, Jwing Ming. I respect Master Dillman, but you are right about the marketing and shallow content. Part of the problem is history which effects the quality of his productions and to some extent, the content.
As the study of Kyusho in modern applications has grown, so has the availability of better quality teaching products.
I am also a big fan of Master Yang. He is brilliant and a wonderful teacher. I have had the good fortune of being able to study at his seminars in Boston Massachusetts U.S.A. which is where his headquarters are.
I study with Kyusho International. Go to this link http://www.kyusho.com/KItoc2.htm.
Click on the products link. For law enforcement, see "Advanced Officer Survival" "Kyusho Gun Techniques" (I own and train from this one) and Tero Laaksonen "Fight and Life". There is also a Kyusho Tactics Course which I have not taken. I've seen the clips from the training. It is for people who have pretty good gun facility. That would be use of the gun not empty handed close range gun defense like the other DVD. The course is a live course covering things like clearing an area etc.
Kyusho International is developing a good section on Law Enforcement and I can't tell you everything about it because since I'm not an LEO, I don't keep up that much on it. Some of the forum sections at Kyusho International are free and don't require membership. Most require membership. See if you can get into the Law Enforcement discussion area and ask there.
I hope this is a start for you and is helpful.