I wasn't arguing that he was better than Matthews, just pointing out that he supplied something the Packers don't have a lot of on defense, players who make so-called impact plays on a regular basis. From that respect, he was a significant improvement for the defense, but that is only a small part of a players value to the team.
The real question is, does he really "take plays off" in a manner that is detrimental to the team? I don't know the answer to that question, but it is difficult to believe that he does when he generates more impact plays than anyone else.