I am not the dueler-guy, nor do so often at all. But each time I did, it always was a very funny and exciting option while maybe not many people were on, I just was bored or I just wanted to have some distraction. This is completely gone now.
For some maybe more discussable argument now.
For the sake of realism, ranged fighters like bowman (not implemented yet, so take mages and their arrows/flame burst/whatever). Imagine you focused your char to be a ranged fighter, light armor, no melee skill. You want to fight, have to approach on arm's reach, challenge and get killed at once. Again, for the sake of realism it completely makes no sense to me. You may argument pvp'ing could require some players agreement, ok. But that wont work with npc-beasts.
The latest with implementation of bows you would have to change that "feature".