Miami's defense might be good - I don't know and they usually play us tough, at least in Miami - but Seattle's offense is pretty awful. Their OL isn't what it was (the Graham trade broke that line), they have no quick-passing game, and the running games sans Beast Mode isn't what it was.
Seattle's offense won't be in the top 20 this year if Wilson is hobbled at all.
And that offense got more yards on Miami than Arizona's top-rated offense got on New England, AND Miami won the turnover battle 2-0.
Just for perspective.