Guild Wars: Dear Santa...
Not original ideas but a bit of Photoshop goes a long way.
Party formation UI is pretty weak in Guild Wars. The shocking lack of skill of most players (take note: I'm not saying I'm great, just that most people are truly awful) is still enough to encourage me to avoid pick-up groups whenever possible, so I'm not sure how much difference a fancy UI would make to me personally.
As a general rule, if there's a ton of boilerplate spam in areas in a MMO-type game it indicates a need for a more powerful UI. The 3 prevalent spam types in GW: party formation, guild recruitment and (most of all) item sales.