What Helf Lore?
Well, in Cataclysm it showed that Vareesa and her people are still loyal to her homeland, if not the government, and her rangers will work with their Blood elven kin for the betterment of Quel'Thalas. That shows that High elves still retain loyalty to Quel'Thalas, and that is devolpment.
Then, in MoP, there is the fact that High elves led the charge against the Sunreavers, marking themselves in lore as the primary push to remove the Blood elves from Dalaran. Then, Vereesa displays her loyalty to Jaina as she follows out her mistress's orders without problem.
On Thunder Isle, High elves are shown to be the primary source of the kirin tor's military might, that is lore. Several High elven NPCs are important in Alliance questing, marking them as important to the Alliance storyline and overall lore.