I want to make a correction for you, Gen Kiyani is indeed the COAS but think tanks present in the General Staff are the ones that devise PA's policy. PA is not a one man show, it is an institution and that is the biggest strength of PA. It does not matter who the COAS is, the policies devised by these think tanks inside the General Staff will be followed regardless of who the COAS is. I can tell you as a fact that there is no institution in Pakistan that does as much brainstorming as this institution does. The consensus is that Pakistan can no longer afford to fight a full fledged war against India, the fall out will be far too devastating. India is a country of 1.2 billion people with a trillion dollar economy, it is not a contest between two equals.
Another point i would like to make is that there is a fallacy that exists both in India and the Western World that PA wants hostile relationship with India to maintain a dominant role. Lets get something clear here, even if both Pakistan and India do manage to create peaceful relations with each other, PA will still continue to maintain credible deterrence in terms of force levels against India. It will also continue to have a major influence in Pakistani politics as long as Pakistani political institutions fail to deliver governance to the masses. PA's influence is directly linked with governance because traditionally it has always been the Army that has delivered governance and economic growth while in power. It will continue to be seen as the saviour as long as the politicians fail to there job.