I have played a lot of MMORPG games and i think the game needs a Duel system and 1v1 PvP Arena, or Open PvP World. The same way you queue for 4v4 there should be a 1v1 arena and dueling is always fun. I think PvP is one of the most important things in MMO games and it has to be dynamic or varied, 1v1 Arena is the most common, because If i would like to PvE id play singleplayer games.
And my question is: is the game designed to have 4v4 arenas (team vs team) because its not balanced for 1v1?