Hello; turns out said node was messed up in an unintended way, and removed in changeset #162442004.
As for the rest of the Buffer Zone, it is rather arbitrary by nature and would not be wise to rework it by altering its current boundaries; there are still inhabited villages in it and development/cultivation is still possible at locations allowed by UNFICYP.
Although the most ideal version of the area would be placing military ideas onto each other to signify wherever are actually allowed for civilians to enter, I severely doubt anyone would be able to make that distinction accurately mapped due to nature of the area.