Seeing that all the allied races are getting a heritage armor that reflects their identity and adds a cool flavor to the new races, do you think all the other races should get heritage armor in future patches? With their rep+questlines etc. Being the requirement to earn it.
Night Elves for instance can get an updated sentinel+warden hybrid armor that also shows off their skin similar to their warcraft 3 and esrly WoW concept arts that represents their identity as guardians of the nature. Thunderbluff Tauren can get a tribal armor decorated with fangs, tribal art and feathers (perhaps a feathered tribal crown?), Bronzebeard Dwarves can get a decent mountaineer armor that reflects their identityas hardened mountain dwellers, Blood Elves can get the spell breaker armor with the iconic spellbreaker shield, etc etc.
I think this is a nice step in adding flavor to the races that we have. With the appearance of phased zones and the way blizzard is using it to make it possible to quest in old zones it is possible to make old zones interesting for high level players. So instead of having these armors handed to us fairly easily, they can instead lock it down behind world quests and reputation grinds.
They can create world zone dailies in places like duskwood and ashenvale or felwood and have players explore the post old-cataclysm lore of these zones, advance the lore by having us visit these zones and interact with those zones NPCs and do dailies as a high level player without disrupting the leveling experience of low level players.
The reward can be faction armor and weapons, perhaps even titles and pets.