I dont think the wildcat offense is a gimmick, or that it will wont work as well this year as last. When the single wing offense is run correctly, having a quarterback as a runner gives you an extra blocker and opens up a world of playaction, draws, misdirection plays, blocking schemes and deception in general which are legitimately hard to defend against.
If you have players that can block and receive, the defense has a hard time picking what personnel to put on the field.