We would need to see major nerfage to paladins, barbarians, bards, and melees/ranged toons is general if this approach is taken.
Even in content where DC casting works it's far more effective to come with a great axe and plow through the dungeon.
I play a wide variety of builds so I am not looking to see one build shine over another, but if people think DC casters should be ineffective, we should put all builds on an even playing field. I would like to see DC casting work, but if that is not in the cards perhaps nerf the other builds so the challenge level is equal for all builds.