Dueling should be easy to implement and adds a lot of fun when you’re playing the game with friends. Maybe ArenaNet fears that people will start complaining about the game not being balanced over 1v1, but people who would complain about such a thing in a team-based game, are just people with a very narrow perception. Just add a duel function, an option to not accept duel invitations and only good things can come up from this.
Personally, I pre-ordered the game and was playing during betas, but all those months I hadn’t bothered with dueling, I didn’t care because I had no real life friends who were playing the game. Now I got one to play and we’re trying to bring 2 or 3 more friends. I want to duel with my friends for fun, but I can’t. They are just laughing at me for playing a game without duel at 2013!