Here's an idea:
Each baseball stadium generally follows common guidelines around what size to be and what field dimensions to follow, but each one is also unique. Most notably, Fenway Park has "the green monster", a large wall in left field that's extremely high thereby making what would ordinarily be home runs nothing more than stand-up doubles. So does it make sense for up-and-coming promotions to tailor their cages or should all rings/cage be symmetrical? What about the idea of having one side of the cage that's longer than the others? What about arranging the cage so that one corner's angle is sharper than the others? It would change the way fighters battle in the cage and perhaps create a unique fighting experience. We're seeing now that the open space of the octagon is causing certain fighters problems (Mirko CroCop) and the smaller cage of the WEC promoting engagement among fighters.