This worth the capability argument only really works in places where countries can actually afford them.
Remember, Yarmooks are still running without Radars, the VLS cells have not been fitted.
Remember, Harbah's have only been fitted to a single PN vessel.
etc etc, theres many examples of the harsh realities, the PN just cant afford everything.
Even the Tughril class are scaled down- they have a bunch of kit deleted, including the Towed Array Sonar.
PN has no choice. The addition of a further 12 cells requires reengineering recertification etc, costs pile up.
I remember visiting KSEW, The Baburs were ready to be handed to PN dockyard, but PN refused to accept delivery for a while... discussing it with MD KSEW... the reason? no money.
We cant use the capability benefit scenario too much here, because the real restrictive factor is cost. The best approach for PN is to FFBNW, which is seemingly whats happened on yarmook batch 2