I, for one, hope we never see those aircraft again. Assuming they operate as USN aggressors, they will have been put through numerous hours under extreme conditions that will have left the fuselage with less life than our own f-16s, which were produced before them. Those aircraft are lost causes, not only because of their age, but also the era and threat perception for which they were procured is long gone.
Fighter aircraft seldom see the kind of combat they are touted for and our f-16s, post-Soviet Invasion, were no different . For us, the 90s passed in a blaze of sanctions and the failure in Kargil. An all out war with an aggressor India never materialized. And an aggressive Pakistani endeavor across the non-Kashmiri border was impossible with an air force composed of f-6s, f-7s, and Mirages; such amazing engineering marvels...of the 60s. Ironically, our sanctioned f-16s adequately provided the defensive footing we were cornered into, following the rapid development of the Indian armed forces and lack of it on the Pakistani side.
When the f-16s were originally procured, they were a very real threat to a nation on the brink of economic collapse. Today, those very same numbers would leave us inadequately prepared. In hindsight from the resulting economic fate of the two nations, Pakistan's last chance at wresting control of Kashmir died with those initial sanctions. We could have used those f-16s then; we require them today more out of ego, to wash away the sting of the US refusal to provide them in the first place.
The damage done to the Pakistani armed forces capability was more extensive then we'd like to believe. Wiping away a crucially important decade, that ended up deciding the South Asian balance for the foreseeable future, has had geopolitical repercussions which will be felt for years. Chief among them, the dwindling reputation of an armed forces that have been the only stable and constant force in Pakistani history. The aura has been dimmed by years of non action and passing of time since the last all out conflict. We have lost far more than we will ever gain from the procurement of these specific aircraft. Less fatigued air frames would be far more beneficial, but still limited in the incremental jump in capability they'd provide the PAF in relation to it's adversary.
