I agree to what you said is the role of pakistan, but if security policies were just based on rhetoric, there would be lot lesser militarization around this part of the world. Apart from that from prior experience, there are reasons for the surrent afghan government to doubt the rhetoric of pakistan vis-a-vis peace and stability.
As far as arty guns are concerned, I am sure you are more than aware why they are needed in COIN operations, I am sure your FC operates a few too, don't they. Apart from that there is an extensive need for air support vehicles, surveillance vehicles, medivac vehices, IFV's, APC (Just like 500 of them given to pakistan under EDA), Light armored vehicles, and a sustainable security infrastructure.