Except, oddly, the 2030 scenario seem to be taking place with the technology of today. Which means it will be at least 10-20 years behind the times.
I've read nothing that doesn't suggest that the U.S. will not have deployed rail guns, lasers and hypersonic missiles on most naval platforms within the next 5-10 years, all of which would give the U.S. advantages in stand-off striking distance and lethality.
Also, give China 5 more aircraft carriers and the necessary support vessels by then. A target rich environment for the above weaponry, safely launched beyond the reach of Chinese technology to either defend or retaliate against.
Rest easy Australia and New Zealand, we got this.