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Aion has one of the best group system that Ive come along, imo. All you have to do to apply for a group is to rightclick "Recruit Group" in chat. Or you can left click to see what classes the group allready have. Dont see any reason why this should not be in GW2. But from the post on Gw2.com today I highly doubt that it will be in the game.
Would you like this in GW2=?