There is nothing inherently wrong with speedball. It was a format created to try to legitimize the game as a competitive sport and to make it easier to watch. Unfortunately, paintball is a horrible spectator sport as it has no real focal point for viewers.
The only truly balanced field is a symmetrical one. Say what you will about the attitude and rate of fire of tournament speedball, but the fields do offer a perfectly balanced game suitable for competitive formats. If you want serious competition there has to be acceptance from the participants that all things are equal at the whistle blow.