I only had time to skim your post, but you are right.
For years they have stated he missed duty and hinted darkly as to why he missed the physical and such and it never gained traction. They figured having documents (and they only dared to create spinnable ones since there are living witnesses) would give them the boost they needed to "finally" make their allegations stick.
Addition:
Here is what she said:
"He did have complaints about Bush. Bush missed his physical and went off to Alabama with none of the paperwork, I remember Killian talking about that," Knox said. "But it wasn't in memo file."
http://www.freerepublic.com/focus/f-news/1216254/posts