This is just a short thought about what Kilta_Firelotus mentioned about a technical problem with the AH whereby people congest the area by crowding in front of the AH. The simple solution is to scatter it around. Make a few clearly marked access points throughout the cities so people aren't all forced to crowd to 1 spot in order to break up the load.

Accessing it from your mog house is also an option but as that would be a system built on top of another system neither of which exist I just thought the option of adding in multiple access points would allow for a solution that wasn't reliant on a different game system that is also sometime off on the dev. table.