There does not appear to be a discussion of ASW tactics by professionals going on here, else we would be discussing the layered approach in more detail. I’m not in ASW either (Assail is) but it is a game in which more than one platform, sensor and weapons system have to play to have some chance of success unless you yourself are a submarine. Those designing the CSC, and indeed all the T26 variants are however professionals, advised as to capability requirements by professionals in that field. I’m not sure this, or any other Internet forum, is going to give you a particular thorough or measured critique of their decisions which is factually based,