Full Lightning, certainly. I'd never run that in PvP. But 30/16 offers enough mobility and survivability to run in solo queue. Sure, Madness (and Madness-heavy hybrid) are more independent, but their potential DPS ultimately hits a glass ceiling, whereas 30/16 can match them, with the potential to heavily out-damage them in the correct situation.
And yes, I was against healers. This isn't a typical WZ, but just an indication of the potential of this spec, which could feasibly hit 3k in the perfect situation. I do however play this spec most of the time (often in solo queue), and will out-damage Balance/Madness players with it 95% of the time. Sometimes by a little, sometimes by a lot, depending on the situation.