in the weapon skills system in adom, as you use a sword you become better at using all swords, what i'd like to see in jade is a tiered weapon skill system, where when you use a sword, not only do you become better at using any sword, but also you become better at using the specific weapon that you're using.
every different sword has it's own different balance and length, even two short swords, made by different smiths are going to have their own distinct feel.
I think it makes more sense that as you are roaming along in a dungeon and you find a slightly sharper sword, that you still prefer YOUR sword, as you have an affinity for it, you've grown close during your adventures. obviously if the sword is a super shiny eternium sword and yours is iron you're going to swap, but i think that the skills you have gathered from familiarity with the specific sword should outweigh slight upgrades to the weapon itself.