We are in the process of tendering for a defence contract for a couple of smaller carriers (to start with). The Navy is looking mainly at a Spanish designed carrier, that would serve as a launch platform for the the F35 STOVL (when they get around to it), sea hawk, etc, and would be able to cary 20 odd MBTs on board as well as an entire regiment of infantry. It would cement Australia's superiority in the Asia Pacific region. We had large carriers in the past, but once the HMAS Melbourne was "de-commisioned" in the 1980s we haven't found it useful to have a carrier fleet again, until now.
But the point of the matter is, several small carriers = more mobility, less of a target, and a big difference in political statement.