I finished off most of the rest of the quests in Dragonblight tonight, which led me sooner than I expected to the Wrathgate event, with a cinematic out of nowhere, a sudden twist of events, and a series of huge fights in a rather unexpected place. To say any more would be spoilerish, and it’s best experienced without any foreknowledge.
And then after that I did a bit more fishing in Dalaran, managing to find the rest of the coins and getting the achievement and coin reward for it. It’s pointless, but I can’t seem to stay away from stuff like that…