The Seahawks really were not that bad of an average team last year. I would take them before I take the Dolphins.
Go back and look at their games last year. All they really needed was a quarterback. Their defense was stepping up in big games, Mr Skittles was riding the rainbow to the endzone for their offense.
Here are games they could have won -
Tavarais Jackson's big fumble ended up costing them against the 49ers, as the Niners kicked a field goal and won (19-17)
They led a really nice comeback over the Falcons who led by 20, and they ended up losing off a missed field goal (28-30) the two interceptions probably cost them too.
Barely losing 6 to 3 against the Browns, Charlie Whitehurst terrible 12-30 for 97 yards, and and INT cost them big in that game, when he was supposed to be "the man that didn't get a chance for starter job"
Those 3 games could have easily made them 10-6 for a wildcard game, or even 9-7 for that matter. Matt Flynn should surely help them out, but I hope they actually protect him and get him some weapons.