Yep, that diagram shows what happens in circle placement (I was doing some diagrams a time ago to visualise dynamics.) As I mentioned in another post, I think this is similar to football formations.
In a circle, players on the borders most of the time face early pressure and frequent 2v1 situations, at least in the 1111 vs 2222 setup.
But with random groups, river or stronghold dynamics are different. That's why I avoid playing circle placement, or at least I make variations like 2v2v2v2 or FFA. Almost always, they send me to the border; most players want to be in the pocket, because the border in circle placement is like that football position that receives more tackles .
The game has so much possibilities worth of being explored