I think it's a valid discussion as to whether the zone's best days are behind us similar to the rise and fall of the triple option. More teams are being exposed to zone principles, and teams are more prepared to play against it than they were, say, 5+ years ago. Even with Pikachu anchoring the zone next year, don't expect the same effectiveness that it had in 2011-2012. Of course, relative to the past couple years, it will seem like a huge improvement... but that's hardly justification to continue down this same path.