Originally Posted by Bullseye
I think the solution to this issue could potentially be quite simple. If you start a round, and do not finish that round for any reason, that round will be rated at (1.5x?) your standard deviation. With that rule in place any unfinished rounds would always be included in your rating. Sure, they will sting a little bit, but the ratings punishment would not be unduly severe.
That would benefit a player more than 1 out of 20 rounds if assuming they are randomly dropped from a round. Considering that the player is probably dropping due to poor performance it would rate their round higher than actual more often than that.
If you were to actually handle dropped rounds this way, then you would probably want to make it 2.5 standard deviations plus one point (and not exceeding 99 rating points) lower than average so that it was at the lowest rating that could be included in the rating.