Yes, how dare these racist people asking questions and caring about the lore. /sarc
That says more about you then it does about them but I doubt you realize that.
Correct, but D&D has that mostly flashed out with different settings and a world far bigger and more explained than WoW. I would even say, comparing that two worlds is an insult to D&D.
Lot´s of people didn´t read the Travler because it´s garbage aimed at kids. Not to mention your “world building” is full of inconsistencies in that novel, showing how much they cared about the story.
Hearthstone is irrelevant to the WoW lore.
This is more a case of Blizzard just being lazy, they could have added a bit of lore to it. Anyway, as far as I see it, not a big deal, I couldn´t care less about the new customization options as they will be hidden by my armour anyway. If anything I find it quite bold from them to sell this as an expansion FEATURE in a rather lack lusting presentation content wise.
As a side note, this is more an issue in D4 with the dark Barbarian skin, as it´s not a class BUT a race. Curious how they will explain that.