the problem with main is that we don't do movedowns because of poor peformance in invite so instead of actually molding main into what it's supposed to be (really good teams that aren't quite ready for invite, and teams that have had a shot at invite but weren't at that level yet) we wind up with main teams that wouldn't even be dominant in IM.
main's supposed to be the middle ground of move ups and move downs that are trying to get their shit together for invite, not a flood of teams from open/im @_@