Scooter, my argument about insurance is aimed at trident replacement, which was one of the leading arguments for keeping MPA.
As for Istar role in Afghan, it was a stop gap that went on far too long and now they have other platforms doing the job.
SAR is the only real issue and littoral Asuw, I suspect a very cheap and limited capability
Ac covering these two roles is about all you have any hope of getting. Imo.