Firstly what US and Western world in general ignores while dealing with Pakistan is the 'nasty' neighbourhood around it. India has always tried to encircle Pakistan using Pashtun nationalist elements in Afghanistan and you've seen the likes of Ghani complete crooks who've been a pain in the ass for Pakistan since it came to existence.
First PM was killed by a Pashtun nationalist. In 1960s and 70s they literally tried land invasion into Pakistani territories.
So when Pakistan sees that US is completely ignorant of their concerns of hostile regimes being prompted under their noses but they don't care. They rethought their approach towards Taliban but remember before that nearly all of top Taliban leadership was captured by Pakistan and handed over to US.
And why Pakistan prefers Taliban over the likes of Ghani? Because they don't actively act against them and keep Indian influence out. Even though they also aren't the ideal case.
Even then Pakistan's influence on Taliban is only to the extent of their policy making. Not on ground support and funding which is complete propaganda which Indian networks peddle anytime and Imperialist and Islamophobes in West happy to propagate as it's a cover for their own failures.
All in all Pakistan reacts to situation in Afghanistan doesn't instigate them. Pakistan has a realistic approach in Afghanistan take the best hand available not what you want. All others players US bomb this, buy those, Iran only sees through the nationalistic view of Persian hegemony. When they see Pakistan doing relatively better they get frustrated like they know something that they don't.
On OBL I personally don't believe a word of the official narrative. You answered your question yourself why no repercussion for something you hunted while screwing the whole world?
Was the same secrecy was around Sadam or Gaddafi death or anyone who US didn't like? so why OBL
There is something more than what meets the eye. But even with what's accepted US forces have stated their was no involvement from within Pakistani sources.
Like how people are coming to realise this whole WoT I'm pretty sure 10-20 years from now something big about his death will also unfold.