Seattle's failures on extra points contrasted to Pittsburgh's two-point conversions reminds me a bit of the Super Bowl between the Patriots and Panthers.
Seahawks chasing points may come around to bite them in the ass.
But they live and die on those long developing passes and so when stuff like the WR not getting off the jam, the a DB reading Roethlisburger's eyes and knowing where he is going (see: Harmon's INT Week 1) and then just like that the WR falling down but him having to put it up early because it is a long pass