Question: "How does the Orthodox Church regard Shared Near Death Experiences? This is where people have a vision similar to the person dying of the white light of love and tunnels and such but return to their body. If these are found to be actual experiences how will this affect our understanding of the afterlife if at all?"
Fr. Seraphim (Rose) dealt with this question extensively in his book "The Soul After Death."
You can also read about this in several articles on Orthodoxinfo.com.
In short, these experiences do not change how we understand death, but the Tradition of the Church does shed light on how we should understand these experiences. People often misinterpret these experiences, but they are evidence that there is life beyond death.
Fr. Seraphim also cites many examples of people who report experiences of torment in their near death experiences. Those reports do not get a lot of attention, because people prefer the warm fuzzy experiences, but they are not uncommon.
So the short answer is that we should not take these experiences on face value, but compare them with the experiences of the Church, and understand them in the light of Scripture and Tradition.