They shoudl change the wards in a way so you go in there talk to the "ward/counter npc" and do your business with her (similar to an AH) then you can link all these wards together and you dont need to have all these retainers to be there "physicaly", which means less stress on the servers and on your nervesand the people wouldnt just hang out in uldah, since they can buy/sell everything anywhere they want and have the same chances. win-win.
Adding more wards would make it even worse imo. The system isnt made for an mmo with many people. At the moment SE can only hope for a server being close to deadsince otherwise well have constant crashes and full wards...
They set too many limits to players and to themselves. They should give up on that stupid idea already...
FFXI now linked the AH all together if im not mistaken for a reason. they should do the same in ffxiv, since its all "instanced" anyways. If it wasnt instanced it would be another thing, but since it is... would only be stupid not to do it.
Everything that can help the game be more user friendly atm should be done. Content ofc is another story.