Heck that sounds like some sort of sustainable continuous industry, delivering to a needy navy. Clearly no short term political gain to be had in such a sensible option.
I do wonder if the Hunter program just swells to become a full destroyer program, and the Tier 2 once selected, become a standard build.
From purely an academic exploration, how would people feel about 3 hunters with 64 VLS, 4 Hunter PLus ~13,000t, with ~128 VLS, and then 12-14 Tier 2 ~5000t.. Additional tier 2 built at Osborne? Again purely academic, and more focused on build rates, crewing, workloads, than capabilities.