Here are some of the game stats from the Packers playoff loss to the 49ers:
And here are the 49ers's game stats from their subsequent playoff games:
Rodgers admitted he didn't play his best game against the 49ers, and based on the above game stats you can see what he was talking about. While there was no offensive explosion by any of these four teams, the Packers were the only one held under 300 yards of total offense. They were also the only team that didn't turn the ball over against the 49ers, which was a big reason why they scored 20 points. Obviously the incredibly frigid conditions at Lambeau played a part, but that didn't hold back the 49ers's offense.
Looking at these stats, the Packers were the weakest of these four teams. They were the lesser team on offense and defense, but the fact that they had zero turnovers helped keep the game close. Their 2013 record was deceiving because they were without Rodgers for several games, but the overall team effort still wasn't the best in the NFC after his return.
How can the Packers improve in 2014? Obviously they need better players on defense, and every position except cornerback could use some fresh blood. On offense, maybe they're a whole lot better if Rodgers and Cobb don't miss half a season, though the offensive line is due for some sort of a re-shuffle depending on the future of LT Bryan Bulaga and C Evan Dietrich-Smith. They're not that far away from another Super Bowl, so long as Rodgers is healthy, but they have more work to do than these other teams.