FGunz
Heavy sword that does many times more damage in quest mode.
Swording down quest bosses has always been pretty fun, but it takes forever. Like chopping down a tree with a butter knife.
How about a questing sword that is very heavy (70-90 weight), but has massive (quest) damage. Basically so heavy that you have to commit heavily by sacrificing armor and guns. As far as damage I am not really sure. An LMG does around 200-500 damage per second, while a sword can get 30-120 with a lot of effort. Could be a large sword with a big movement and attack speed penalty. Making dodging more difficult and justifying an absurd damage.
I think it would make for a unique quest reward that allows a different approach to questing.