So these new arragont goblins are going to be introduced in next xpac & 2nd starting zone will be in Azshara. With all the hype of this new implementation... what happens to all the history (structures, ruins, etc..)?

Just say good bye to the most historical area in the game? THE SUNDERING!!

When Cataclysm is released, Azshara will finally be a fully quested zone, complete with lore and other coolness.