The re-shaping of PAF in early 1980s with 40 F-16A/Bs, 50 A-5IIIs and 32 Mirage-5s were a very major capability upgrade for PAF.
That first buy of F-16 was not bad in itself from capability point of view, while not considering kickbacks etc. It also brought the all-aspect AIM-9L. But still I think that it would have been better to purchase Mirage F-1E instead of Mirage-5. At that time, all the air forces were buying Mirage F-1E and in Iran-Iraq war, the performance of Mirage F-1E was quite impressive esp when it shot down Irani F-14 Tomcat too.
Pakistan could have acquired BVR AAM (Super 530D) and Anti-Radiation missile (Armat) capability way back in 1980s had it inducted Mirage F-1E instead of Mirage-5. F-1E with M53 engine has far better performance than the 60s era -5.
However, the serious mishap seems to be the 1990's attempted buy of F-16s. Those F-16s were not delivered due to Pressler amendments but even then its amazing that PAF was adding more fighters without BVR missiles. I dont think that AMRAAM was part of that package.