That's what a pass rush will do for you...sacks are great, but consistent pressure is even better. I hate the 3-4...you tend towards oversized, less athletic DL for the most part, and even if you bring both OLBs unless they beat the OL with speed or a surprise, they don't beat the OTs very often with power, and they seldom stay in lanes for batted balls because they can't physically stand up to the power.
The 3-4 was never intended to create a better pass rush; it was designed to stop the run, making it difficult for big OLs to get the 4LBs blocked. When a 3-4 gets as much pass pressure consistently as a 4-3, it's usually a very unique combination that goes beyond the OLBs.