that's a terrible argument, since the only purpose of tenebrium... is to make your weapons more powerful.
if that is traded off AGAINST your skill with the weapon, then it's entirely pointless.
the way it SHOULD have been handled was that the tenebrium skill only affects how much damage handling tenebrium does to your character, and the only reason to use tenebrium on a weapon would be so that they could harm certain monster types; like silver vs werewolves.
this sounds like something someone could mod into the game, once people figure out how to use the mod tools in detail.
