OK, I understand it now.
It seems to me that even under the ROCOR method the clergy might turn the back to the Eucharist or communing clergy.
Example: There are 5 communing clergy.
Clergy persons #1-3 commune the body from the left, the NW.
After each of them communes, they move to the right, the SW. In walking to the right and to the SW corner, each one turns his back to any clergy who is communing on the body at that moment on the Northwest corner.
Clergy persons #1-3 might form a line to the SW of the altar where they wait for clergy #4-5 to finish communing on the body.
Clergy person #4 finishes communing on the body and goes to the back of the line on the SW corner. In order to walk from the front of the altar to the end of the altar line, Clergy person #4 must turn his back on the Eucharist while Clergy person #5 is still communing on the body.
Still, it seems that the ROCOR method makes it less likely that the clergy will have to turn their back on the Eucharist if they are using a line system, and anyway the turn can be at a wider angle.
I still feel like I don't have a strong hold on the idea unless I diagram it or something.