I definitely agree with everything you stated. I too played and now coach, so I certainly see your perspective of Seattle's defense running through Earl, Wagner/Right and the D-line. However, where I'd disagree is, opposing QB's now know that to minimize the effect the D-line can have is to use formations to isolate their skill guys in 1 on 1 with the DB's. Earl isn't going to help much with the entirety of the defense if he is dropping down to cover. And if you're going to have Wagner or Wright or both go out into coverage against a spread, then you're going to have mismatch's and hope your 4 man pass rush gets there before the QB can throw. Against teams that don't have the personnel to do that, there won't be much of a difference. Against a team that can spread them out with 4 or 5 quality guys (Not having Freeman is going to hurt Atlanta), you'll notice the difference in not having Sherman/Chancellor. If I'm a QB, I'm gameplanning against Griffin and Coleman, whereas previously the gameplans were going away from Sherman.