Um... they're adding dances and emotes in quests all the time, aren't you paying attention? The Mog Station dances are extra ones they work on. Although ti would be nice if they added them into the game via NPCs (and I agree that the eastern dance could have been acquired in Doma), I often read in these forums that they don't add any emotes or dances into the game via quests at all anymore. Which is not true. We get emotes in almost every event, and we got 3 beast tribe dances in HW, which are all available via quests.