The Bro Ryan Defense try's to confuse the offense and gain an advantage by substituting players after the offense tips their hand. It's a complex scheme that requires smart players to implement. Sounds like something that would suit a team with inferior talent. Different than the 2014 defense whose strength was the front 4 lining up and beating their man with their God given talent.
I don't know crap but that's my take on it. Not too hard to understand why it didn't take well.