Void hasn't been doing nearly as well this tournament as heroes like Doom, Brew, Enigma, Lycan, Tinker, etc. Just because he dominates in few games doesn't mean he needs a nerf.
Again, this goes back to the Naga discussion. If you pick a mid game oriented lineup and don't win in the mid game, you're probably going to lose late. That's just a natural tradeoff. Sure, Void isn't complete food early game, but he certainly doesn't bring as much to the table as heroes like Razor or Clinkz. If he's able to survive into the late game, heshouldbe able to lay the smack down on them, especially if he's backed up by a farmed Weaver and Tinker.