Coaches borrow alot from other codes: conditioning, recovery, game strategies (zones etc.) ...
... now I know they work on Set Plays but I'm curious why they dont take that to the next level and copy the American football's extensive use of Set Plays across the whole defensive/offensive unit that is on the field at a given time. From watching their game (no expert here!) they all seem to be in on the play, they all work to it's execution with blocking, positioning, running, breaking right or left.
Imagine Judd coming back into the centre after a goal, he yells "89, 89" up and down the ground, it gets relayed across the park:
The play involved is an an attacking play, a defender (Jammo for example) is going to come sprinting through the square, one midfielder is designated to block his opponent, all midfielders know where he's going to be and are positioning to make space for him ... the ruck knows he has to push it to that side of the ground ... Judd wins the ruck flicks it out straight to Jammo ... there's more ... the forwards read an 89 as push forward at the bounce, the 50 is now empty ... Eddie and Yarran know that as soon as it hits Jammo ... Jammo will be bombing it over the head of the players now bunched around the 50 ... both Yarran and Eddie turn and bolt towards the goal square, Fev and Fish know this and have positioned for blocks ... both break free, the ball rolls towards the pocket, Eddie gets it and flicks it to Yarran who lazily snaps a goal before raising a digit and yelling "89 ... that's what I'm talking about!!"
... hhhmmm, it's been a long off-season.

They don't have to be complicated plays, and it may only work from the centre bounce ... it just means that players up and down the ground are involved in a play and it's not limited to a play phase: kick-out, stoppage, bounce, etc ... each player knows if we win the ball, what will happen and what their roles are and all 18 work towards it's success. It's not something they won't have considered but there must be a reason they're not doing it, any ideas? Is it the lack of surety of posession (obviously without the ball all bets are off)?