For me the most confusing thing was absence of the deck fragments in the Collectibles. I can see all previous decks there with the descriptions and locations/requirements to get them, I can even see some Molag Bal items for future events but not Hermaeus Mora Deck.
Sure, on PTS it's given straight away, but I'm curious about how we collect the deck on live. From the Patch Notes we know fragments can be found within the shelves and books of the Endless Archive, but so far I've found none of them (maybe they don't drop since we already 'have' the deck? but no, I see the comment above, they do drop). And there are so few shelves and all glowing alluring books in the Archive contain only texts, so idk.