Rebuilding expertise? I think the governments moves on the Automotive manufacturing is a clear sign they want Australia to get out of manufacturing, period.
I wouldn't be surprised to see all overseas builds from now on. If the government has a problem with say $500 million in tax breaks, incentives etc for a much bigger industry that is more viable (Toyota makes money and Ford and holden have in recent history), I don't have much hope for the ship building industry.
Automotive manufacturing was one of those strategic war industries. You could convert the whole thing to making something else. It had the volume so you had 10,000 skilled metal workers, or 1,000 engineers, or 50 high speed milling machines and an industry to keep them going. Just because they made cars, didn't matter, the US proved you could convert them. Alan Mulally spelt it pretty clear that is not just about Auto, it about manufacturing.
There's no point in welding up hulls if you don't have anything else that is part of the equation.
We might as well get our ships made in Thailand or Korea because that is where our manufacturing, parts and logistics are. In fact our defence should be based around securing these two countries.