A little support for this view in this article:
My link
What caught my interest though is another comment, about something I've been wondering--the defense simplified things and only ran a few different sets.
Given the switching between 3-4/4-3, I've been wondering if the complexity has taken a toll? I was thinking the defense probably needs to do exactly that, simplify, and allow them to play without thinking so much. A little late now though...