I'd like to see the following. Some of this stuff is repeated, just casting a vote:

1. PvP. From Haven, Pay X, fight another player. Maybe pick from a roster of folks? Invite to Fight via the Social area?
2. If you add PvP, consider betting, with crown or energy. 3 Rings, take a cut of the winnings if you want as you do with trades.
3. Auction House. Been said, highly needed
4. Better social tools. Hard to follow tells. Auction House should remove some of the noise as well. Again, been said.
5. Web-based stats page. When I log into my account I should be able to see my character and view my current info *without* having to login. Ideally, I'd like to see my inventory so I don't have to login to work with the Bazaar Forum.
6. Consider a developer API for stats, or player data, or current pricing or anything.*
7. Request to join screens are modals (take up the whole screen). This *really* gets in the way sometimes. Requests should be a lot more subtle.

* I'm a web developer/designer and can think of a million cool things to do here.

That's it for now.