The part that it seems few people are placing enough emphasis on is this.... the defender "Malcom Butler" made an absolutely GREAT play. If you watch that play back on youtube.... he made as good of a defensive play as I've ever seen. He didn't tip his hand that he knew where it was going to go. Most any other defender and that play was a touchdown. Or at worst, an incompletion due to pass interference. That kid deserves all of the "blame" for Seattle losing.
The other thing to consider is that Lynch was stuffed on the series that Seattle had to settle for a field goal on. While everyone, including me, suspects he would have scored.... that's not a forgone conclusion.
A run play would not necessarily have to go to Lynch. I think they should have used a two-back set, faked to Lynch, and given it to Turbin, or had Wilson keep it to run or possibly find the tight end.