The bottom line is that having two teams in the same world is legal. It always has been. Am I crazy about it? No, but I understand the reasons why GD wants it, and I can respect the reasons why coaches want it also. And honestly, it if helps populate the worlds a little more, then it's a good thing.
Not that I think anyone that cheats really cares about my opinion or anyone else's. But, I really hope they look at themselves in the mirror, and ask themselves if this is who they truly want to be. In order to make yourself competitive by 1) swapping names with another coach, 2) agreeing on "territories", 3) using your ID's to help scout for each other, 4) targeting a competitive coach with one of your IDs to benefit your "primary" team, and/or 5) scheming another way of using one team to the other team's advantage, then knock yourselves out.
Nothing I say or anyone else says will stop those coaches that get their jollies from cheating at a simulation football game. If that's you, then so be it. I'll continue to win regardless of what you do. But, I hope you figure out that there's a better way. It's never too late to decide to live your life as a man of integrity..