The problem is there is no local sam exceot Anza (so why even add it), and no local CIWS, nor a helicopter drone. The development of these would be over 100m each. While i get what you are saying, the entire problem is off the shelf solutions are needed because Pakistan doesn't have these things. Now we know the hulls likely could be cheap as Pakistan sourced Damen hulls for ~$50M/ship (if im not mistaken
@Bilal Khan (Quwa)). I would suggest going for an 850-1000t up scaled design based on Azmat design (its the same concept that the Turks were doing milgem/tf-100/tf-2000 designs). Add a hulk mounted sonar, torpedos, and rocket oropelled depth charges If you dont want to spendthe money for Umkhonto, then remove the current main gun of Azmat and replace it with Pantsir-M which has 2 gatling style CIWS guns and 8 missiles with 20km range. Keep the rear AK-630 move the RHIB dock to a side bay. Replace the rear RHIB dock with a small helipad for a SAR/light attack/dipped sonar unmanned utility chopper...like a modied AVIC AV-500W. It already is armed with 2 8kg antitank missiles with 5km range. Im sure the thing could also be modified to drop life saving equipment (like a self inflatable raft) if utilized for SAR and remain on station until help from the main ship (a RHIB or mother ship itself) arrived. It could also be modified to use dipped sonar array and maybe a few depth charges for antisub role (probably too small for even a light torpedo)
That doesn't mean you dont build capacity. Remember there are changes made to 4th Azmat that apparently done in house. Some of that likely extended the time for construction. Are they going to pumpnout ships as fast as china right away, no but slowly they will build capacity. I thino the planning though must start from today.