There's a piece of the New Zealand rugby arsenal missing.
At some stage in the next year, the driving maul, or rolling maul as it was once known, needs to be added.
The All Blacks don't need to become obsessed with it but they do need to be able to set one, organise one and make it part of their offering. It would be negligent not to. Rugby's maddening laws make the driving maul almost impossible to defend. They can't be brought down - they can only be stopped by being held up, or if they collapse under their own weight.
The attacking side has all the rights as, for some inexplicable reason, it's deemed okay to have a phalanx of bodies between the opposition and ball carrier. It's an anomaly in the context of how the rest of the game is refereed but, however illogical, these rules are there to be exploited.
England, France and South Africa all showed last year that they have confidence in their driving mauls - and with good reason. All three, especially England and South Africa, are expert at winning attacking lineouts and scoring tries through their maul. The Boks did that at Eden Park, England got close a few times at Twickenham and the current Six Nations is providing more evidence of how big a factor the maul has become.