"Ascendancy at the breakdown is the most important thing in the modern game. Whoever controls that area generally wins.
"The Australian backs are capable of finding gaps but only if they have the ball. The decision on who goes in to forage is important. Obviously [openside flanker] David Pocock is one but he needs support."
Macqueen says the Wallabies need to take heart from their 14-9 victory over the Springboks in Durban during the Tri Nations.
"South Africa might be world champions but Australia has had their measure of late, winning the two contests this year. South Africa would need to step up to win. Australia deserve to be favourites, especially with [Francois] Steyn and [Bakkies] Botha out.
"The World Cup is about timing; a team needs to peak. It's like England in 2003. They nearly blew it because they were a better team the year before."
Macqueen says one Australian problem is inconsistency: "For whatever reason, that is the case but something like the World Cup can help because the players are together a long time. They have also been fairly consistent with their positions, injuries aside.
"This team is capable of special things; they have the ingredients to pull it off. Just look at the names in the backline - Kurtley Beale, James O'Connor and Quade Cooper - they've all got the ability to produce something extra."
Like Macqueen, Eales wants consistency in selection and performance from here.
"We have to do what we're already doing. Don't get distracted by the moment; it's irrelevant whether it is the first or 81st minute [in injury time]. These types of games, when there is so much at stake, require 80 minutes of excellence, not just patches of it, as happened in the Irish loss."
The ground in Wellington has fond memories for the Wallabies. It is where Eales kicked his injury time penalty goal in Stirling Mortlock's sudden absence to retain the Bledisloe Cup in 2000.
"I'm one from one at that ground - a 100 per cent record," Eales laughs. "I'm lucky I haven't had to make another kick to ruin it. I just concentrated on what I knew, took myself out of the situation, got back to my style, rhythm and what you know works."
Australia could take heed.