That's the main issue with Varus currently... however, I could totally see Riot adjust a couple numbers and make Varus an AP (or Hybrid) Marksman. Then he could be a halfway-decent counter to Zed, as there wouldn't be much AD to steal, and rushing Seekers into Hourglass (Didn't someone do that during the LCS as item 6 instead of GA anyway?)
I never played much Varus, but as he stands now, I wonder if rushing Essence Reaver or Hextech GLP would be better-suited than Tear...