The Pakistani army is not the ANA, the ISI is not the NDS. We will destroy the Taliban if they ever attempt to invade Pakistan- they know better.
If their is any military in the region which resembles the ANA/NDS it is The Gangedeshi army & RAW... poor training, weak morals, unprofessional airforce which misses its target and gets shot down, soldiers unwilling to fight and rather commit suicide etc... Hell I think the IA/IAF/IN is more untrained and will unfurl more quick under pressure than the ANA did.
Furthermore TTP will be hit in Afghanistan now- VIA UCAVS, fighter jets, cruise missiles, etc... or via covert operations by the ISI. Kashmirir & khalistani freedom fighters will now get a major boost via moral increase, training, and weapons left behind in afghanistan.