Cross-region matchmaking setting options

I know a change has been made to let players from isolated regions finds games. However, it would be really great if there were options in settings that allow you to only matchmake within your region. I play from Southeast Asia and I keep getting put in games with high ping, which is making gun fights un-winnable. I know Oceania players are also having this same issue. It really makes me feel like not playing the game. I would rather have longer matchmaking times than go through constant unsatisfying games. As a result, I have been playing Marathon less and less. I hope something can be done about this, because I have really enjoyed my time with this game.