Domestic condition is not good in Pakistan and to butcher own public (Pashtoon, Baloch, Hazara etc.) you need a professional war criminal, others may have to learn the ropes.
At this volatile time when inflation is making Pakistani public eat grass, opposition is getting huge crowds in rally and public is openly disgruntled by their 'brave shaheens and Gazis' a new COAS may not be able to contain the situation.
It's almost entirely because of domestic powerplay and reasons, Afghanistan peace process may have very less to do with it.
BTW At more than one places Bajwa is seen looking at Imran in a particular way, with Hamza Ali Abbasi an open case wont be surprised if there is a gay angle to this (not saying this to troll).