I've been hoping for a bestiary system like in Final Fantasy XII, where we got lore info on the monsters and their behaviour or even evolution, but could also get pages of world lore by unlocking these additional pages through killing a certain number of the monster which entry they were attached to. I've put up the question if we'll ever see such a system for the past three live letters in the hopes of getting it answered, but no luck so far. I'd love it though. It'd give a good reason to explore Eorzea again, plus I don't mind doing a bit of extra work for my lore, even if it is just killing monsters. I'd be curious to see what Twintania's entry would look like.