They took a huge step in the right direction this season, but this game exposed a lot of things for the Packers. They can be lit up fairly easily and they'll need to address their pass defense in the off-season.
They have the guys up front and another year of seasoning will only help them improve, but besides Woodson and Collins, I'm not sure about that secondary.
Bigby is a big hitter, but he's not a coverage man. He's good in run support, but he'll often be out of position and he's not that great in the open field. Jarrett Bush is a special teams demon, but not a nickel back.
Tramon Williams is still a major project. He flashes, but he can't matchup with the big physical receivers. For all the flack Harris gets, he's still playing at a higher level than Williams. Finally, Brandon Underwood has talent, but he's still very raw.
I would add a corner and a safety this year via draft or free agency. Probably the draft. They also need a pass rusher opposite of Matthews. Look at the Cowboys' defense. They became great late because Anthony Spencer finally turned it loose.
They're about where I would expect them to be talent wise after one season. They need to do some things though.