Do you think they will ever

I've used an Elemental Weapon for a while now without penalty. Its been a few patches and server checks since these weapons were fixed and there hasn't been any holy reduction. However, supposedly Arch Mages get the reduction if they use the opposite elements. Thus, I'm going to assume this is how Nexon intended to have the weapons function.

Then again, you never know if they decide to nerf them. The safest bet is to either not use an Elemental Weapon, or use an Ice Wand so that it won't lose too much value.