Uh, what about Tripplett, Royal and Davis?
Tripplett is an upgrade over Adams - Royal is a definite upgrade over Campbell (esp as a blocker & there is potential in Everett), they franchised Clements, Andre Davis may be the other burner they need to stretch the defense.
Please explain what Marv should/could have done differently? Free agency isn't like grocery shopping (or Madden), it's a competetive market place of zero sum games, and most often it is out of your control.
Your just sour grapes until you can rationally explain what you would have done differently up till now.