Battered Hilt -> Quel'Delar weapon quest made repeatable
I've discovered this quest chain isn't repeatable in the original game. I'm suggesting that if it's within your power to do so, make it so. I've tried to consider any way making it repeatable could be exploited and I cannot think of any. It would just be a way of having a pretty good weapon twice, for dual wielders or because you want different enchants for different circumstances.
I'm also making this suggestion to get a sense of this process, and whether this sort of thing is anywhere near the area of something you would consider doing.
Allowing dual wielders to "have a pretty good weapon twice" isn't by any stretch what would scratch the surface of qualifying as a good reason for a custom change.