The search functionality on the auction house is being increased from 3 to 6 parameters which will make finding that perfect piece of gear just a bit easier.
Blizzard Quote [source]
Thanks for the feedback! We're looking to bump the number of Preferred Stats slots from 3 up to 6. We're also looking to bump the number of digits in the "Min Value" window from 3 to 5 (so you can search for Preferred Stat values higher than "999").
No longer will you have to wait for auctions that will never end, in 1.0.4 you will be able to cancel any auction at any time as long as it does not have any bids
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We like this solution also. We definitely want to provide players with the option to cancel an auction (at any point after it's posted) so long as it does not have any bids. Right now, we're looking at this for 1.0.4, but that of course may change depending on implementation and testing.
You will be able to search for stats on legendary items, I wish that existed when I was looking for my Stormshield.
Blizzard Quote [source]
We're definitely working on filling the missing gaps. On a somewhat related note, we also want players to be able to search for stats on Legendary items.
My favorite change that was talked about today - the ability to see the stats of completed items.
Blizzard Quote [source]
You mean stats of items in the Completed tab? If so, yes -- that is functionality we're looking to add. We're also looking to make it so that you can see the listing price of unsold and cancelled items in the Completed tab, as well.
Not auction house related but a few items are having their color changed which will make it much easier to notice potions and gems among other items.
Blizzard Quote [source]
Changing the text color of gems (as well as potions, crafting pages, and tomes) has been something we've debated doing and not doing for a while now. We've finally come to an agreement, though, and decided to change the ground text color for these items from white to light blue. This is something we looking to implement in a future patch.