[quote=Jei]i.e. a tenebrium requirement of 3 on a two-handed sword applies a -3 to the users two-handed weapon skill, but can be lowered to a penalty of -1 to the two-handed weapon skill if the user had a tenebrium skill of 2.
That would functionally be WORSE than the way it is now, since you'd have to invest in BOTH skills, or neither. At least this way if you haven't invested (or respec) you only need to invest in one.
Honestly, I'm a little more concerned with protecting players who have invested points in a weapon skill than not trying to make things even simpler for those who haven't. I don't feel that having 0 skill in (example) two-handed weapons and 2 points in Tenebrium handling should make you a better two-handed tenebrium swordsman than someone with a maxed two-handed weapon skill and 1 point in Tenebrium handling.
Respec is so poorly implemented I don't see it as an option. People should not have to risk permanently losing skills/spells just to respec for Tenebrium handling.