One area that the Packers 9th ranked defense struggles, is at generating consistent pressures and sacks from the edge rusher position (Grading from Pro Football Focus Premium Stats). This issue has not been brought to light as much as it should have been because of the fact that the defense as a whole has shown a considerable amount of improvement from last season to this season, and because the Packers have an above average grade of 71.3 in the area of pressuring the quarterback.
However, a deeper look into the player personnel grading/rankings will show that the Packers edge rusher positions are clearly the weakest group on their defense.