I'd like an Auction house if the same one was accessable by all three cities.

The retainer system reveals Square's really bad/shortsighted plan of 'funneling' everyone towards Ul'dah with the mainline quests. Now Gridania and Limsa wards are severely denuded of retainers/items. I went to Gridania the other day and found 0 retainers in the crystalier ward. In shock I jumped to battlecraft wards and found just 1 retainer there. Later I went to Limsa. It turned out to be a little healthier but still severely lacking.

An AH shared by all 3 cities would solve the unhealthy market wards of the other 2 cities.

And I have to agree RMT are the problem and SE keeps trying to find in game methods of inconveniencing/thawarting them without realizing or conceding that RMT do EXACTLY what regular players do except on a larger scale. When they try to stop the RMT they end up hurting the players as much if not more. They need to police the game more not rely on their gimmicky anti-RMT bot scripts. By the same token... (not to say I love them... I just don't think there's any way to get rid of them) Whey RMT is 'controlled' rather than 'out of control' it's not bad. I mean shards/crystals would probably still be 300+/3000+ gil if it wasn't for them.