The conversion of these ships was to make them into 'service' carriers supporting the four main carrier divisions. This never really happened and they operated as full aircraft carriers. As always, needs outweighed dreams.
I have thought about fitting enclosed bows to these ships, but have followed the thought that these ships were not meant to have been used as full carriers, more as maintenance carriers. Thus the requirement for better seakeeping is not needed for these ships.
The main CV carrier divisions had only two ships per division, the light divisions had four ships. In each case one pair of Zuiho's were matched with either a pair of Ryujo's or a pair of Junyo's to make up their division. While the main carrier divisions cleared out the Pacific of enemy aircraft carriers it was left to the two light divisions to clear the South East Asia and Indian Ocean theatres.
At this stage of the war, Australis and Zealandia have committed their ships to the European war, in the Indian and Atlantic Oceans or the Mediterranean Sea. It will take time for those countries to extricate their forces from their European deployments and bring them back to where they can challenge the Japanese regional dominance.
