The idea of the sea control frigate is interesting, but it's only a concept at this stage, and regardless I don't think it's as suitable for the RAN as a larger design. Sure it might work for the USN, but they'd be using the smaller vessel to compliment an already existing fleet of high-end surface combatants. The ANZAC replacement (from what I've seen of the requirements) is meant to be the latter, not the former.