Dalaran, the magical "Shattrath of Wrath," just keeps growing and changing. Mumper spelled out some of the coming changes for Dalaran. Don't worry -- it's all good news for those of us looking forward to slumming it up with Rhonin in the floating citadel.
One of the more nagging issues about Dalaran is that no matter how high above the city you fly, you get a debuff that warns your flying mount is about to disappear. You must land before you plummet to your doom. It's set up this way to help enhance the feel of the living, bustling city -- you experience it from the ground, without racing Netherdrakes swooping by you at every turn. Mumper promises they're keeping an eye on the debuff and any other issue where flying mounts might disappear.
There are many more NPCs coming for Dalaran. Vendors will have both dungeon token gear, like the new Heirloom items, and also high end Honor gear. Mumper describes a pretty awesome new NPC. Around 6pm each night, a new character will walk around the city, and light each of the lamps with a spell. It's just fluff, but it's awesome. Details like this make WoW such a rich, interesting game.
There are other bits and pieces. Characters jumping into the magic well will get teleported to one of five sewer locations. Guards will be spawn at the exit of Dalaran, to deal with any griefers trying to keep PvP flagged characters from leaving the city in safety.
And the target dummies are definitely staying.