Hm... cut scoring down to win/lose. No. Any system that
Now, if you had a separate score for a draw, then we could talk. Now players who sandbag get better than a player that lost, but are not treated mostly equally to those who won by playing the game. So maybe start with win/draw/loss being 1/0/-1. Naw. Easier to track if we all have a >0 score. So how about 2/1/0? Not quite. Let's up it by 1 for any multi-day/multi-month events just in case. So, 3/2/1. Now people who don't play at all are lower rank than those who lose.
For MOV, we record what you won by and record a 0 during losses. That way, a player who wins big and loses big (a 1 point, 0MOV and a 3/400MOV) isn't considered equal to a sandbagger (2 2 point, 7MOV games).
Now, In a 3 round tournament, you have a 6 point spread. Max score 9, minimum 3. Until we reach >8 players, this works awesome. As we set up for higher numbers of players, we may need more division to increase the spread size and reduce granularity. There is a game that FFG puts out has a great system with higher resolution in scoring results than XWMG does. I forget the name. Should be easy to find.