All of that is exposited in far earlier instances of the game. And Dark Souls didn't invent environmental storytelling. It just capitalizes on it, and is what has introduced many people to it.
Not saying what Nixxe is saying isn't debatable, but idk, this is the first time I've heard anything about WoW having environmental storytelling on a big scale. Of course, I don't usually come to the table to hear about WoW, but now I'm curious.