There was a report than Indian nuclear armed Sukhoi’s had been moved into Kashmir. Squeeze play maybe.
Sadly, India does not really have a longterm strategic vision for PostPakistan.
Yugoslav it - Pakistani Punjabis have started pining for India, where the Punjabi language has not been superseded by Urdu.
Many Pakistani artists move to India to advance their careers as performers in Bollywood.
The Durand Line should be abolished, and one of the great crimes of the British, seperating the Pathan people into Pak and Afghanistan should be rectified.
Other regions of Pakistan like Sindh could become statelets or absorbed into India.
Baluchistan, which was never supposed to be a part of Pakistan after Partition, could, if independent be one of the largest producers of gas, perhaps even oil in the world. Their compatriots in Iran may welcome that.
But, what’s encouraging is the attitude of the US Army towards Pakistani double talk. They sound just like the Indian Army in Kashmir!
Maybe its time to think the unthinkable.
That is, what you were thinking in the rest of your post.
Giving them their own state was supposed to bring peace. It has instead brought 60 years of warfare. May as well flip over the chess board and start a new game.
Pashto and border regions to Afghanistan. Let them sort one another out. There is no point to pretending they are part of Pakistan.
As you say, independent Baluchistan. Let Iran worry what that means to them.
Some portions of existing Pakistan might reasonably remain independent. Consolidate Kashmir. Absorb some regions into India itself. If Pakistan is not a real country, its time to re-think the whole project. Just make sure the adults wind up with the nukes safely disposed of.