I guess i didnt explain idea very well.You see, a concept of "front and back" that you have when you say "rear" is only valid in maps that have endings. If Earth was indeed flat, it would have ending and beginning. But, since Earth turns out to be round, it really has no "front" or "rear". Nor would the map that i proposed.
Here is a pic below. As you can see, from perspective of read team, it takes similar amount of time to reach enemy if they go north, or just to go south and end up facing enemy aswell. Edge of the map is just virtual, while this concept forces us to think outside the regular box. It is just an idea, and from my opinion, its just as bad as classic "limited" map. And just as good, too. Advantage is that it gives much more maneuver space and prohibits abuse of corners and edges, Downsize is that it does not simulate realistic environment, but neither does edgy map.