They tried to make the zones based off stuff from Warcraft (Spirit Healers, Nathrezim, Scourge/Cult of the Damned and Fae stuff) but didn't do it enough. They aren't going to ever get that weird again.
The fact that Revendreth is inspired by Nathrezim, but they don't appear until first patch, is ballsy creatively but doesn't work for most people considering how many people didn't get that they were connected at launch. Same as how people STILL don't understand why Kul Tirans are big and the Drust Vrykul connection: they need an NPC to stare at the screen and say it.