Quote Originally Posted by Aviars View Post
You probably haven't because you can't really say it's wrong.
Oh, I don't disagree on principle - I just find it a moot point when the rating system has no solid base to stand on in the first place. And if people can still viably wintrade in WoW, it just means that the population at the time of the wintraders queuing is small - so small that the trading teams are matched against each other often enough to make a difference. It makes a world of difference if the matchmaker has 1000 teams to pick from or 2, namely that you'll not be able to play against the same team very often in the prior case, which vastly improves accuracy of the rating.

That's just the population/time bias. We also have our lovely tier biases, because the tier affects how much you gain lose, whereas the matchup scarcely does. Stomping newbies first round grants/loses as much rating as a hard-earned clutch victory in the last second caused by even teams. Being in a lower tier however automatically loses you less points per loss than being in higher tiers. A perfect 50% winrate at bronze would allow someone to gain rating faster than a 50% winrate at silver or gold respectively. (And truly, a 50% winrate shouldn't even allow someone to climb in the first place).

Do I have to mention the bias based on roles and jobs? Not all roles and jobs are equally influential, which again, screws with rating accuracy.

With all these issues, yours just being one in a pile, I see no point in having a rating system in the first place. It gives people the false illusion that it's an accurate representation of skill when it fact, it suffers from loads of issues that make it more of a broad hint.