[Martin Smith]

In purely practical terms, discounting people's worst race can be useful to help eliminate variables that are outside our control. For example if random disconnections were a common problem, it might make sense to score only the best 4/6 or 5/6 races depending how severe the problem is. But I don't think there's any reason for a poor result that's outside our control. I suppose one could argue that real life obligations can be one of things outside our control. Obviously that takes precedence over gaming. Even then I don't think interruptions to whatever we schedule in our lives are so common that we have to make a new rule for it.

There are probably all sorts of other pros and cons of the idea, which have been discussed. But the bottom line for me is in principle, it's always a bad idea to add complication to anything without a very clear, well-defined benefit for it.