This is a trade off, and even as a veteran I've only recently become aware this was a thing, but if you turn this option off you forfeit the ability to achieve a victory (towards your daily quest) if the opponent flees after you've submitted a team, so I'm gathering the people who did know about "splinterviewer" just waited until the time was nearly up to submit so that exploit couldn't be used, but I agree, all things considered we should just adapt to not getting quest credit on surrenders...