I would like to point out that it was pass rush and coverage issues that lost us the playoff game.. The pass rush didn't get home, and coverage was less than average..
The two work hand in hand..
To me, Revis is a game changer. He will completely eliminate a WR. That allows you to schematically do things different with the pass rush if need be. Doom didn't get home against the Ravens, as a result our coverage was exposed. There will be pass rushers in the draft and in FA, but there isn't a Revis Island in free agency, and a draftee would take time to develop into a shut down corner..