Baguley, Gleeson, Goddard, Ambrose, McKenna and Hurley have all been playing together for several years now, although admittedly not always as permanent defenders. Hartley, Brown and Dea for the last couple of years. McGrath has had less experience with this backline than any of the above players and the only brand new player there is Saad.
To me it doesn’t look anymore or less familiar with each other than the midfield and far more so than the forwardline which has been almost completely changed under Woosha.
Ridley McNeice and Redman might push for games in the backline during the season, but I’m sure there’s enough senior leadership back there to cover a rookie.
It’s not the best backline ever seen, but it’s more than capable of holding its own defensively if the midfield can improve their pressure and win more ball. When they do win the ball in the backline it they’ll be as good, if not better than anyone, with the likes of Hurley, Goddard, McKenna and Saad all capable of getting the ball moving the other way at high speed.