Agreed. It makes sense for different WS to have different effects associated to them and not being restricted to just stronger basic physical stats and the oftentimes very puzzling TP modifiers. As long as they scale well as players increase in levels we should be finally able to viably use a more varied repertoire of tools.
One of the things I'd like the most is if actually Weapon Skill affected weapon skills in a much more meaningful than just the att and acc stats.
Edit >
As a RDM one of the things I'd always wished existed is having elemental weapon skills that lowered elemental resistance to the opposite element the way ninjutsu and Ancient magic do. Say I use Burning Blade on a mob, and it lowered their resistance to water depending on Sword skill level.
So maybe at the highest level it would double my Enwater damage for a short time (10 seconds maybe?)
And things like that.