Camera coordinates were only needed to draw the shapes so that they matched the 3d world. All the information AVR Encounters used is still available. You just can't draw it in 3d but a 2d map is very much doable or you can point an arrow to a safe spot. In fact there already is a
mod being developed that does something similar to what AVR Encounters did but using a 2d map. Whether that goes against the new rules is still a bit up in the air.