While rummaging through my 40kRP books, considering finally starting to work on that unified homebrew of mine, I skimmed through Into the Storm, and I came across (as I have done many times before) the Elite Advancement Packages.
All 4 of them. Only 1 of which is really illustrated (Sanctioned Xenos).
Why so few? I mean, I understand that it was not in the Core Rulebook, since they were introduced in Into the Storm, but it just feels like that kind of thing that could be thrown into just about any book here and there; most notably the recent Hostile Acquisitions.
Right now it feels very much like a bit of a forgotten mechanic, hardly worth mention. A parenthesis.