Pakistan has zero willingness to lose American patronage. Ask your chief of air staff or your admirals and generals if they're willing to ditch their fleets/gear in favour of Chinese goods.
With postponing talks till proper contact, a sit down with the Donald, is established between the two new leaderships in DC and Islamabad/Pindi, Pak are just trying to play a game of measured hardball with dealmaker Trump.
This is a decades old relationship, dating back to almost the conception of the nation state of Pakistan (or shortly thereafter)
At this stage, and after decades of cultivating Pakistan as an ally (including that big win vs the commies in Afghanistan), the US has Pakistan by the balls but it's not like Pak don't have any cards of their own.. geography, logistics for ISAF/NATO equipment supply routes, spilt blood..
Trump is just taking away Pakistan's jihadi 'good taliban' joker card, can't play that one anymore.. or you'll have much to lose.
India, for it's part, has actually done some good work in that country with infra, military equipment/officer training etc, and have managed to gain the goodwill of the anti-taliban warlord leadership.
A neutered/non militant "taliban" might find a fit in the peace process going forward but they are no more an effective blackmail tool. Trump will just level that whole country with MOABs if he has to, he really will, nobody should doubt that.
Trump wants a good outcome in Afghanistan and is willing to put his skin in the game with the troop surge, a big political risk because his core supporters want nothing to do with Afghanistan or any new wars.
That won't work. India built infrastructure in Afghanistan and still exercises extreme restraint in the valley.
If it were like China or other authoritarians, nobody would be allowed to show up when local kids like Burhan Wani are put to rest. They get non lethal pellets in their eyes only because some idiots try and pelt rocks (potentially lethal projectiles) at the security forces.
Pakistan are a problem in Afghanistan, not entirely, but to a large degree of America's making.
Not all bad though. If the US, as a country, can change course so drastically and elect Trump, so can Pakistan. Throw your Afghan talib friends under the bus and make deals with Trump, why not.