In principle making best use of what we have and extend isn’t a bad proposition. The main issue is Argus’s age, it is almost 50 years already will it go on for another 20yrs till replacement?
Also, the assumption being made is that the end state will be 2 LHDs, which I think is far from certain. I still think that the analysis performed in the late 80s/90s holds, to have an effective 100% ARG capability a group of ships each optimised for its role (and can be position as such) is the best mix - e.g. 2 LPH (equivalents), 2 LPDs + 4 LSDs.
Would say now that a new build / converted Aviation Support Ship with similar capacity as the original Argus would be a smart purchase, keeping Ft Victoria running on and releasing the cash for the 3rd FSS.
"For get this quite clear, every time we have to decide between Europe and the open sea, it is always the open sea we shall choose." - Winston Churchill