As someone who spent years working in government-ese, there is nothing new here at all. None of the documents are actually classified. They are standard policy propositions layered with heavy technical/government jargon. The intelligence community and DOD is meticulous about properly classifying even the most mundane information that could be connected to anything of consequence for national security. Hence, it has been the standard for decades that every single classified document must have a header and footer with its classification level clearly posted. I was put on the spot once in a brief for not having a footer with the brief's classification on one slide in a PowerPoint. None of these documents have the required headers or footers. Logical conclusion, none of them require it because none of them are classified.
The real government is far more boring than the one that appears in popular conspiracy theories and movies. Trust me, the real government is a boring employer...great health insurance though!