Not sure if the structure is better, however defending transition seems to have improved because of players buying in, pressure on the ball, midfielders valuing defence over chasing disposals, new players coming in and controlling both possession and ground territory better. Like many teams this has been a big issue in recent seasons. Concern is still defending when they don't have time to setup or is on their terms i.e. lose centre clearance, wet weather, turnovers and high pressure games like finals. That will be the big test and they have failed everyitme this has happened for as long as I can remember.
They certainly get there chance to prove they have changed over the next two months. Should get there chance in finals footy which I guess we will finally get the real answers