I think it's great for our military to be utilized defending Australia.
Good for morale, good for Oz, good for the Orion crews who will get a decent amount of flying.
It's also good for the contractors supplying the military. I notice that the Govt has announced the procurement of a whole lot more patrol boats.
Since the systems the military have are so good at detecting incoming threats I expect the positions of illegal traffic will be advertised for those who would prefer to remain clear.
Actually Orions might be a smart choice... able to drop survival gear but unable to pick anyone up