Bold part: No, India will be more disaster-prone if India-held Kashmir goes to Pakistan. Note that many of the big sources of river water is in kailasha/Manosa Sarovara lakes in the north of Kashmir. It is the source of water for the Sutlej, Indus, the Ganges and Brahmaputra. So, once Kashmir is in Pakistan, the latter will use it as a time bomb to deprive water to both India and BD.Disastrous if Kashmir goes to Pakistan. India would be more stable without Kashmir. Although I'd prefer India and Pak keep fighting over the holy land of Kashmir. Fight Fight Fight.
So, there is little prospect that India will ever relinquish the control of sources of these rivers by gifting Kashmir to Pakistan. It will be the starting of the demise of what is now India. BD should want Kashmir to be with India for its own future economic and political security. A peaceful solution of Kashmir with the two contesting countries accepting the status quo is the best solution for our region.