If you are going to look at the situation "sensibly", then you would have to take into account the fact that the Pakistani Army has a significant number of troops and resources deployed in the West (FATA, Swat and Balochistan). The largest recent military purchase undertaken by the Army is for MRAP's, equipment that is largely beneficial in COIN operations. The Army has publicly identified domestic terrorism as the biggest threat to national security, under two successive Army chiefs. The military has had to slow down many of its modernization plans because of the economic slowdown in Pakistan. Given all of the above, allegations that the Pakistani Army escalated the situation along the IB/LoC for the sake of pushing in a handful of militants before the winter sets in sounds ludicrous.
Then there is the argument that this is on the behest of Sharif to deflect attention from domestic issues. Here too the facts contradict this particular allegation - Sharif and most of the PMLN senior leadership have been largely silent during this whole issue. At the very least, if this was an exercise to deflect the attention of the Pakistani public away from the PTI/PAT dharnas, Sharif and his senior leaders would have been engaging in the kind of hostile and inflammatory rhetoric we have seen from the likes of Arun Jaitley and other BJP leaders. In addition, given the military preoccupation with domestic terrorism outlined above, and arguments that the Pakistani Army has yet to cede space to the elected government on foreign policy issues, I don't see how Sharif could convince the military to engage in a pointless escalation along the IB/LoC. Sharif is banking on the "Turkish model" of economic growth leading to increasing civilian control over the military. This is one of the reasons he has been such a strong advocate of increased trade links with India. To argue that he would throw his entire agenda away over some protests that are diminishing in terms of impact every day is, again, ludicrous.