I've thought about easing out the burden on Uldah as players ourselves,
seeing it's not really necessary to stick to UD to the current game state..
I can understand back when we had no airships, no chocobos, UD is really the pick to gather all players as it's possible to travel to the other two cities with the least area transitions, while the Party Search was worse than what we have now, and without the Player Search function.

Here's my proposes:
1. Sellers should place their retains according to the target buyer of their items, to the city with the corresponding guild. For items like Materia and Catalyst which every class might have an interest in buying them, just leave them at UD, this alone should spread out a lot of players piling outside the UD market ward.

(Have to confess this is not really a good idea, but after the server merge, I've been feeling less and less willing to travel to the market place of UD. SE should really do something here to create interests from sellers to place their stuff to other cities, or implement something mentioned by others to allow easier access to view items in the MWs)

2. English speaking players should really make use of Player and Party Search, or at least the Party Search alone. As of today the purpose of your party can be clearly stated from the criteria provided as you try to recruit, while searching for a party was and is always as simple as picking the class you want to join as, the game lists possible parties for you. The Japanese players are using this without a problem, so why should we still be avoiding it?