Here's a list of some various things I think would improve the game: -

• Add a "take all" button to the mail interface. If you have to buy lots of items off the AH (e.g. if you buy 10 green shards individually to craft an item) it's cumbersome to take them all out of the mail currently.
• Colour code the dots that show up on items with unique variants (currently always yellow blobs) based on the potency of the UV. E.g. low=yellow, medium=orange,high=red,vhigh=purple. This would make it much easier to find items with better UVs on the auction house.
• Rebalance auction house listing fees for materials - currently many materials cost more to list than their sale value. Although it's possible to start listings very cheap to ensure they sell and the listing fee is recouped, this situation is surely not intended.
• Change the default sort category on the auction house to "buy price" (or save the last used sort). It's surely obvious that this suits the way the majority of players use the AH better than having "end time" as default does.
• Add an option to elevators to pay a small amount of extra energy to choose the next level (only from those that are normally available on the gate). Waiting around for levels better tailored to your equipment to come up is frankly boring and since players can already choose any of the levels anyway (albeit by waiting) I can't see that this would cause balance issues.
• Consider reducing the unbind cost of 4/5* items. Currently many such items are not worth unbinding and selling. The root cause of this is that the cost to create these items is significantly lower than the cost to unbind them. I feel that if these costs were closer there would be a healthier market for the higher star level items.