Rear area escort…gotcha. What are the rear area threats?
Coastal piracy/attempts of reinventing letters of marque, blockade runners, SOF operations;
Space-enabled cheap drones (flying/surface).
Also, inner screen of convoys and personalized escort of important assets in higher (but not high) threat areas, including Gulf if necessary.
It really is not, it is even more lightly armed than the Independence with regards to defensive armaments.
Effective AA suit for both is BAE mk.110 and RAM. But for Independence its RAM is self contained pack, due to limitations of design, which comes with half the ammo capacity. It also lacks proper GFCS radar.
FFX, as shown, has the latter, full capacity RAM launcher(21 missile) and SEWIP 2. Which is same level as FFGX and non-fl.3 burkes.
A single 57mm, 30mm and a lonely RAM launcher are not "well enough", Destroyers have seriously eaten into their VLS to defend against Houthis missiles. 16 cells should be the absolute bare minimum for a third line ship that's not intended to operate anywhere near a peer force.
57mm BAE (which comes with both prog and guided rounds btw), by an large, is best naval tool in the world for small swarming incomers(surface/slow air).
RAM is, at very least, best tool in US arsenal for CIWS work against at least average IKEA cruise missiles, but it also works well enough against simpler targets even when they don't emit. Both also happen to be tools which can be ressuplied at sea, without specialized facilities.
The whole point for these threats is to defend against them without touching VLS capability. You don't come with VLS to attritables fight.
By that logic the USN can bolt a couple .50 cals to fishing vessels and call it a day. Both concepts are equally inadequat.
Nope, by my logic there's a need for fully seaworthy hull with sufficient speed(incl. at sea states) with full WVR (aviation term, but you get the point) suit not eating in any attritable categories. Everything else can and should be modular.
Also, I honestly don't see reasons for sarcasm aimed at boats with 0.50 guns. It's an important capability, and we have recent examples of how navies paid dearly for considering those below them.
Submarines are what prevent an opposing force to achieve any form of battlefield superiority or initiative.
It'll take a long reply to that. Long story short - no, it doesn't work this way, and in any case Ru navy modern long range multirole submarines can still be counted with fingers of 1 hand.