Not Exactly New
These errors in Australian Google Map routing aren't exactly new. I reported the problem with routing for the Pacific Highway, from Brisbane to Sydney, almost 12 months ago. I did receive a polite letter back from Google saying that yes, it was an error and thanks for pointing it out... we'll fix it soon. I guess it all depends on your definition of the word 'soon'.
That route down the New England Highway isn't a minor issue either. Even if Google Maps sent you directly down the highway, with no small detours, it's still almost a 2 hour longer run than the Pacific Highway, which is the route it *should* offer as first choice. Their routing *used* to work, I've used it numerous times in years gone by. Perhaps they know something about plate tectonics that the rest of us don't?
They've had other problems with Australian maps this past year. For several months there were no street numbers, anywhere, they simply disappeared. This took a good three or four months for them to fix as well. Many of the map photos line up poorly too, something they don't appear interested in fixing at all, as reporting them garners nothing in the way of a reply.