Doubt it, if any kind of mutilation did take place it was most likely militants, wildlife, or some kind of equipment failure. If Nawaz plotted with Jindal to frame the PA then I think there would be a lot more to this than just a story.
My own theory is that there was some kind of conflict between the soldiers that led to their deaths, and the others came up with a story to save themselves from the courts. It would explain why another was injured, and the others simply ran away.
Its the job of the accuser to present evidence, so until that evidence is put forward proving Pakistani involvement I would rule out any theories outside of India including Nawaz, PA, ISI, etc.