It's not F16s per se, but the sequential de-leveraging process as far as Pak-US relationship is concerned. Couple it with Turkey, and Eurasia is looking like lost altogether. Not that Mr. Trump has any "paradise lost" syndrome to begin with...
Bro,
This is an illusion and people are falling for it.
Why do you think Russian economy is tanking? Due to American policies. Russia desires friendly terms with the US to fix this problem to an extent (Trump administration might give Russia some breathing space in this regard). Since oil prices are low, Russia is left with no option but to tap Asian economic corridors to sustain its economy; Russia has already embraced INSTC for the said purpose and might be willing to tap CPEC for similar reasons.
If Russia abandons India, it will jeopardize its standing in INSTC and loose access to a huge market; Russian economy will sink further as a consequence. Therefore, Russia is likely to tap both INSTC and CPEC to its benefit but will not pick sides in this case.
If Russia taps CPEC, fellow Pakistani might perceive it as a milestone of its foreign policy. Expect to witness moments of euphoria and celebrations in Pakistan in response to this kind of development.
However, Russia is not abandoning India, period. Russian economic situation does not permits it to.
And no matter what, Pakistan is not ending its diplomatic ties with the US to appease any other state. American leverage extends to both defense-related and economic fronts in Pakistan. Pakistan's economy is in dire situation in current times and IMF is resuscitating it. USAID is also involved in various projects in Pakistan for the benefit of common man. CPEC will offer some economic reprieve in the long-term but it cannot sustain Pakistani economy on its own.
Pakistan seeks to diversify its defense-related investments by involving Turkey and China and therefore the hype. Turkey is important to us in this regard.
IMO, Pakistan should have decent relations with Russia, Turkey, US and China and encourage investment from all of them in order to defeat Indian designs and economically prosper. This is a challenging task but doable. Pakistan should stay away from any COLD WAR. We have suffered enough from our involvement in the earlier one. If my country is smart, it will carve its our own path to supremacy and not depend on a single entity to function.