Player rating for tournaments across all installments of Heroes.

What if the oscillator doesn't start from zero (as suggested)? Then the underdogs might actually benefit. I suggested starting the linear part from 5 points, which would eliminate the disadvantage for underdogs (especially with a large number of participants). So, the oscillator isn't unfair; we just need to figure out what value to start from (I believe it shouldn't be 0, because the non-linear component isn't zero).
Therefore, we shouldn't blame the oscillator entirely; we just need to refine it.