
You'll notice that there are a lot more inns banks and auction houses scattered throughout the city. There's one for every major area with the exception of the Valley of Spirits. No auction house there. Garrosh is really showing that Troll love.
As stated by some reports, Trolls were going to be kicked from Orgrimmar by our pal Garrosh. Fortunately this is not entirely true. The Trolls still occupy the Valley of Spirits, but Unless I missed one that is the only place you'll see a Troll NPC in the new Orgrimmar.

(As seen looking north from the Goblin Slums.)
The Valley of Wisdom is the new squatting area for the Tauren. They have even brought along their own architecture for the area.

(As seen entering from The Drag.)
And we can't forget about the Goblins. They are now camped out just south of the Valley of Spirits in the lovely and apply named Goblin Slums.

(As seen looking south from the Valley of Spirits.)
The Valley of Honor hasn't changed much and retains most of its uses.

(As seen entering from The Drag.)
The Cleft of Shadow hasn't really changed at all. There is an additional portal to Blasted Lands down there now though.

And a few more shots to show some other important spots:
First is the view as seen upon entering the main gate. The big building in the middle is Garrosh's new playhouse.

And a shot of The Drag which isn't as much of a drag as it used to be. It has more lighting now and visually looks more like the rest of Orgrimmar instead of the back alley that it is now.

(As seen entering from the Valley of Strength.)
This is the main portal hub north of The Drag. They aren't all active yet, but based on the imaging I would assume that (starting at the top and going clockwise) they go to Uldum, Vashj'ir, Deepholm, Mt. Hyjal, and Twilight Highlands. The one in the backgroung goes to Tol Barad.

And finally, the zeppelin towers have been moved into the city and are pirched right on top of the central plateau.
