I love it less now. This is the first sign of the injection of more "action" (fight scenes) to improve ratings, after their having almost been cancelled (yes, it happened after season 1 too). I'm not too interested in fight scenes, they take time away from the science fiction, and often are contrived and embarrassing.
I can see your point, but I don't think those conditions are met by this episode. The duel is an integral part of the episode, as it showcases an aspect of Vulcan culture and is not presented as gratuitous or in any way "tacked on" just for action value.