--all the while while the man on the mark's body language says 'are you for fair dinkum? --So the effect is 2 fold,
Well yeah, exactly - why should body language ever say 'are you for fair dinkum?'
You can just see some players (at times) are annoyed at the rule and annoyed at the umpires for not calling play on fast enough - but these are pointless attitudes that don't help them win. It's in the attitude category of having a sook, which means it can be controlled and done better.
If you feel like you're a threat with every fibre of your body... it'll show. The oppo will sense it. The Grimes 'coiled spring' example you provided is no surprise considering he's the master at being in the moment, but it wasn't the norm across the team last year, I don't think. Even Shane Edwards, the ultimate dedicated team player, was losing muscle tension when he was on the mark. That tells me the attitude comes from the top. From Dimma.
It's time to get over it and play to the edge within the rules they set. You're on the mark? Bang - you're in their head. You're about to pounce and kill.
Sure, you can't impact other players on the ground - so forget about that and focus 100% mental energy on conditioning the kicker to feel uncomfortable. That's what you can do. Be ready to pounce. And
look ready to pounce. One way to look ready to pounce is by standing like it's the start of a 100m sprint. "On your marks, get set..." with eyes on the oppo and ears on the whistle.
The crouching tiger. Mentally emit a vibe that the oppo faces immediate danger if they take half a second too long to make a decision. This can only increase anxiety, it can't decrease anxiety in the oppo.
How long is our player "out of the game" after the disposal? Depending on how long the coaches think that player is "out of the game", perhaps even make it a rule to always make physical contact with the kicker after they dispose of the ball, even if it's just a soft hand to the forearm 2 seconds after they kick, purely as a mental tool to help our aggressive mindset and to condition the oppo to expect some form of confrontation if they take too long. That's something, and something is better than nothing. What else can they do that's better? Don't say they should do nothing when they can do something.
I'd also predict umpires will sometimes call play on slightly quicker if the players look more poised. The tone set by body language should put pressure on everyone to move it on quicker. Why not? What's the downside to being fully focused when you're 5 metres away from the ball? I hate the mindset that we're a man down. We're not a man down, that's just in our heads. There's still things we can do. Perceived pressure on top of that list.
IMO our suboptimal manning of the mark stems from a feeling inside the club that the AFL is disadvantaging us with rule changes, and this was the straw that's broke the camel's back. True? False? If it's true, we're letting the AFL win by sooking about it instead of behaving like we're above it and like it doesn't affect us. Dimma's comment suggests we haven't flicked a switch in this area yet, but I hope we do.