In its current implementation?I want some evidence that says that we NEED an AH over the current system besides the tired "All MMOS have an AH"
Takes slightly longer to buy items: after searching and clicking on your item, the buying process would be over in an AH system. In the market wards, you still have to run to the retainer, and possibly switch wards.
Takes longer to sell items, especially multiple items: if you don't remember all the prices after multiple price-checks, you'll have to take multiple trips between the search counter and your retainer. Having to trade the items you want to sell to your retainer also adds extra time. In an AH system, all this price-checking would be done without moving from the counter and there would be no trading.
Do we need to scrap the retainers and make a real Auction House? No, probably not. I do not think so.
Do the market wards need to evolve into a system where everything can be done from the search counter and you don't even need to step into the wards themselves? If this system wants to appeal to most MMORPG players and wash off the anger the wards created, most likely.
Honestly it's not even a matter of functionality anymore. This game has a lot of bad press to get rid of. Keeping one of the systems that was complained about since conception in any way that reminds you of the original concept doesn't seem like a good idea to me.