It doesn't really matter what the colours were designed for - they work. The different patterns were tested in every environment imaginable (jungle, rocky desert, sandy desert, savannah, urban, mixed urban, good old Aussie bush, night) and the selected pattern proved the best. DPCU proved best for darker environments and Multicam the best for lighter environments, with the hybrid the best compromise.The colours designed to blend in northern Australia. Which will really help us when we go to war everywhere else.
I think it also helps that it more distinctly Australian than Multicam