I reckon if you're already differentiating between 1st, 2nd, etc, then that's enough - on other rounds, after all, several of us can finish on the same points. Course, it can mean someone does brilliantly, scores 700, second is -120, third -150 etc., yet only a point behind. But I think that'll work fine - not that we're mega-competitive necessarily, but it means the winner isn't going to streak ahead.