Certainly, I think the additional ASW helicopters should be considered at some point.
The future fleet will have 12 destroyer/frigates at least 12 OPVs and 2 large LHDs so they could have the potential of operating 40 or more helicopters if they wished.
Whilst 'more' ASW helicopters always sounds good, I still struggle a bit to see it actually happening, and if it does happen, probably not for quiet a while yet.
By 2020 the three remaining FFG's will be gone, yes they all had a double hangar, but they were rarely operated with two airframes.
That will leave the fleet, for most of the 2020's, with 3 x AWD and 8 x Anzac all with single hangar arrangements.
Assuming all goes to plan with the Future Frigates, start cutting steel in 2020, you might just see two (or three?) of the ships in commission by around 2030ish, the 9th is planned for deliver in 2038.
That is when there will be 3 x AWD (single hangar) and 9 x Future Frigates (double hangar) in service.
Even when the double hangar ships are in service, I would imagine that for the vast majority of the time they will operate with a single MH-60R and most likely a UAV of some sorts, maybe up to MQ-8C size.
With the 24 MH-60R's, the plan is that eight are always available for deployment and the remaining for training and maintenance, and has been stated, to provide a 'surge' capability when required too.
And of course how many of the 11 (eventually 12) Destroyer/Frigates will be on operational deployment at any one time? Half? Two thirds max?
Unless the Government, or some future Government, actually states that the Future Frigates will operate with two MH-60R's, then the current number of airframes appears just about sufficient for the job.
As for the OPV's and the LHD's, not holding my breath there, especially for the OPV's, maybe you might see one or two assigned to an LHD, in a major operation, but then again maybe not.
Just because we will have all these hulls that are capable of taking an MH-60R sized helicopter, doesn't actually mean that will ever happen.
On the other side of the coin, I certainly see the need for a greater number of utility airframes for the use amongst the LHD's, new AOR's, Choules (and eventually either the additional AOR or Choules type ship).
And maybe a larger pool of LUH (more of the HATS type EC135 airframes) for occasional use on the OPV's and Hydrographic fleets. The OPV's are far more likely to have a UAV regularly deployed.
Anyway, just my opinion!!