The HCF hull form largely common to the T26 can accomodate an increased VLS payload. The model showing 96 VLS is a testament to that, and it isn’t just a marketing model, it’s underpinned by a comprehensive engineering design assessment right down to equipment allocations in revised compartments, variable missile payloads and a full build and cost impact assessment.No arguments about the subs, but I've never agreed the Hunter can't carry more missiles, and recently news from BAE has vindicated me. Remove the multi mission space. Even if you add no Mk 41 VLS, a 13m x 21m (approx) space allows for a lot of deck mounted SM2's, ESSM's and NSM's. Just put an angled wall up for stealth on the sides, like the Taiwanese missile boat Tuo Chiang Class does.
As for the Arafura, you could argue it's the wrong ship, or you could say Australia needs more levels of ships, like the RN does, with Front end Type 26/45, light frigate Type 31, then the OPV RIver class.
In case you don't know, SM2's can be deck launched https://www.baesystems.com/en-media/uploadFile/20210813155115/1434614211149.pdf
The HCF design baseline is fixed at 32 Strike length VLS, for one reason, and one reason only. It is what the Commonweatlh wanted. During the initial bid, BAE offered different VLS cell configurations and was keen to offer 48 VLS at the baseline offer to match the AWD variant, but the CoA assessment only wanted 32, and BAE was told that there are no bonus points for more….
Fast forward 5 years, and now it is made to look like the T26 selection was not appropriate because HCF hasn’t enough VLS cells. Go figure. BAE can offer a two variant build strategy supporting both a ASW frigate and DDG, with greater than 95% ship design and system commonality. But again, those in charge remain paralysed awaiting a further review of Naval capabilities.