On a wing and a player

To the last free agent leaving the Georgia Dome: Please remember to turn out the lights.
The Atlanta Falcons will look decidedly different under first-year head coach Bobby Petrino this fall, and that can't possibly be a bad thing given the last two late-season collapses.
But Petrino and general manager Rich McKay can't afford to make any mistakes with regard to the free agent market or the April draft.
Atlanta’s defense took a serious personnel hit Monday when defensive end Patrick Kerney accepted a 6-year, $39.5 million offer from the Seattle Seahawks. The Falcons couldn’t afford to ante up to keep their 1999 first-round choice, who was an unrestricted free agent, and their defense will likely suffer for it.
When John Abraham was healthy last season -- granted, it was brief -- he and Kerney formed perhaps the league's most dangerous pass-rushing duo. Which player would you double-team? Unless the Falcons pull a surprise player out of free agency, Abraham’s numbers (assuming he stays healthy) will likely suffer as the result of more attention from blockers.
Most of the other losses appear minimal. Offensive guard Matt Lehr, who received a four-game suspension during the season after a positive test for steroids, was released. No problem there since the Falcons are getting away from their old cut-blocking ways.
Wide receiver Ashley Lelie, a free agent, signed a two-year contract with San Francisco on Monday. Again, no big loss. Reputedly an answer to Atlanta's need for a deep threat, Lelie caught just 28 passes for 430 yards last season. It's true that he was wasted in a heavily run-oriented offense, but he dropped quite a few passes.
Aside from Kerney, the only significant loss to date was fullback Justin Griffith.
He revealed himself to be a versatile back last season, filling in at tailback late in the year when injuries left the Falcons with no other alternatives. In addition to being an effective blocker, he was a very capable receiver that the Falcons didn't utilize enough. Fullbacks don't really plug into Petrino's schemes either, so a decent player became expendable.
Still, a big, versatile back who can hammer defenses in short yardage looms as one of the Falcons' many needs.
What would you like to see them do on draft day?
With the 10th overall pick, it's unlikely Georgia Tech receiver and NFL combine freak Calvin Johnson would still be on the board. There's been some talk that LSU safety LaRon Landry, a fierce hitter with sound technique, could be in their sights.
Of all the Falcons' needs, which do you think is the most glaring?