I'm puzzled with what you explain : that you focus on the finest details of promotions but on purpose omit such things as "being prosecuted for war crimes after the war". I mean, if a reader is interested in the details of the career of an officer, it's hard to see why he would not also be interested in their post-war resume.
You suggest that mentioning that being prosecuted and/or found guilty of crimes would not be "basic data" - and this is really surprising, as it must have made quite some impact on the rest of the life of the individuals.
(As a matter of fact, on post-war career, checking whether some joined the Bundeswehr in the 50's could lead to truly interesting findings).
I can understand that you had to limit your research somewhere. But then the question comes: why there? Why stop at war end? The answer is not obvious and you should not be defensive about this being asked.
Besides, I'm pretty surprised with your assertion:
"almost without exception" sounds like "more than 90%" => I invite you to go check the facts. Applying to NSDAP membership war never mandatory and always was a voluntary, individual decision; and membership was not granted automatically.If one was an adult in Germany during the 1930's and 1940's, one was almost without exception a member of the NSDAP.
PS1: I should mentioned that I am a seasoned reviewer ; and that I also wrote biographies (and did not interrupt them on VE day)
PS2: I do take it as a compliment that I could bring at least one NEW IDEA to your thinking, even after 15 years of discussion. Hope you see what is meant there: that some information weight more than others - and you reveal your perspective in the way you lay out data on the pages of your book.