I like the idea of a re work of the way magic works in combat. I don't like the idea of circumventing D&D rules to do so, however. The only thing that is upsetting to me about the potential nerf to WoF is the further deviation from the rules. I like the ideas proposed by some on this thread about reducing the costs of meta's on spells.
I'm not sure why wizzies get longer cooldowns than sorcs on dc spells, however. Longer casting times, ok, but I think some consideration about effective playstyles of the class should be taken. Sorcs IMHO should get longer cd's on nukes, wizzies on dc spells.
Oh, and one more thing. I've seen mention of people kiting through firewalls. Why? Other than certain very specific situations, why are you not kiting IN your firewalls?