Alright, let me put up a scenario.
Player A- 371 snaps in coverage, 51 pass thrown at him in coverage, 34 receptions given up (66.7 completion percentage), 286 total yards given up in coverage, 8.4 AVG, 174 yards after catch, 1 TD given up, 2 INT's, 5 pass deflections.
Player B- 305 snaps in coverage, 43 pass thrown at him in coverage, 29 receptions given up (67.4 completion percentage), 254 total yards given up in coverage, 8.3 AVG, 238 yards after catch, 1 TD given up, 3 INT's, 1 pass deflection.
Player A is Lance Briggs, the games best coverage 4-3 OLB (via PFF). Player B is Woodyard.
Not much difference between either of them. The biggest difference is Woodyard giving up 238 yards after the catch while Briggs gives up 174 yards. But the average yardage he gives up is 8.3..while Briggs gives up 8.4.
The point of this is to show that Woodyard is not nearly as terrible as you continually make him out to be. He's one of the games better 4-3 cover OLB's.
His coverage is not perfect but he is hanging with the best of the 4-3 OLB's...