Oh yeah, stuff like that would be super cool! At least for puzzles that would be nice, so you would still have one reason to collect different elemental weapons for a quest or two.
Not to mention, lightning and other elemental stuff would really fit the game (Though I wonder how people will do the sound effect(s) for them? The closest I can get to a "lightning" sfx is having a whistling mouth contortion with my tongue covering the hole while humming, though it is a funny sound)
Edit: Now I'm making random noises to sound like lightning. Great