For the current war in western region as well as any future war, PAF has odds heavily stacked against it due to absence of some functionalities. A stronger Air Force prevents causalities on the ground, in the sea as well as civilians.
PAF still lacks a dedicated EW fighter (not just an aircraft), enough numbers of fighters and transport aircraft to support Army and Navy simultaneously, a dedicated air to ground missile for JF-17, a 4.5 gen heavy aircraft for CAP or strike missions. In the longer run, a 5th gen aircraft to get air superiority over enemy, a 4th gen aircraft that could carry ALCM, a sanction free aircraft above F-16 category, Indian S-400, long range AAM's missing in PAF arsenal to give enemy AWACs a scare etc
The only worthwhile plus that FC-20 offers is a "sanction free" plane. J-31 offers more.