They should at least consider the American designs although the Tarawa and Wasp classes are significantly larger than the French design. The flight deck is about 70 meters longer, and the displacement is about double. The LDH 8 design has significant improvements over the existing Wasp class. It would give far more capability than the French design.
I agree-the US Ships are bigger & better than the French & Spanish variants being offered.The problem is that the Australian defence forces are not exactly soaking in cash.
They're looking for a Harrier-Carrier, I think.
Problem is, you always need two - just in case something goes wrong on one and you have to land the airborne assets in a hurry.