Lets remember even if a plebiscite is done today, to be fair it must address the following:
1. It must be done across J&K n both sides of the border, not just on the Indian side.
2. Plebiscite is useful only if it is truly REPRESENTATIVE, but the demographics have changed e.g. Pakistan on its side has actively pursued the policy of resettling Punjabi's in occupied Kashmir who are not the native Kashmiri but now deemed Kashmiri and they will vote for Pakistan. Conversely, India has article 370 which means no outsiders in Kashmir and Hindus were run off, which means less pro-India and more anti-India. That is a double whammy against India.
3. Plebiscite must cover kashmiri areas only, e.g. Leh and Laddakh have been historically Tibbatan Biddhist areas. Jammu is more similar to Himachali Hindu culture than Islamist culture. Should those non-kashmiri areas be excluded from any CONTENTION and be deemed Indian without even plebiscite.
4. Even in muslim majority Kashmir of J&K, bakkarwals in the border areas are pro-India SHIAs, but most of the anti-India noise is raised by the urban SUNNIs of Srinagar. A minority of Shia hardliners, act as custodians of all Muslims & whole JK, which certainly isn't a reflection of reality.
India would be crazy to accept plebiscite under such conditions. Solution from Indian perspective is we must abolish 370, bring back all Pundits, actively resettle mainland Indians (e.g. retired army soldiers and their families) to change the demographics to pro-India, this will solve many problem, including preempting any demands of plebiscite. We will not be doing anything wrong, it is mere replication of what Pakistan already did.