The All Blacks may return from Europe feeling the biggest threat at the World Cup won't be a specific opponent but a generic ploy. The rolling maul could end up killing their dream as everyone from up north and the Boks are so darned good at doing it.
The All Blacks must feel at times like every serious nation but them got a memo about the rolling maul: how to do it and when to do it kind of thing. A handy little all-you-need-to-know pamphlet.
What the test against England did was provide a sharp reminder that rugby in Europe dances to a different beat. It's not worse, or better - it just tends to have the emphasis placed on different areas.
The means by which most teams look to exert pressure is usually through their physicality first, creativity second. Whereas in New Zealand it is the other way around.