I like the logic behind this math, that if a world does not do great for one week, it will not just go to the bottom of the ladder.
However, I do have a major concern about the long term use of this formula. I believe that as time goes by, the match ups will be the same for very long periods.
After applying the Glicko 2 formula, the sum of the rating of the three Worlds remains the same. Therefore, for the first division or tier 1 of the ranking (I don’t know how you call it), everytime there is a switch between two Worlds, the global sum of the ratings increases. On the other end of the ranking, the same happens for the last “division” where the sum of the ratings reduces.
Therefore, I’m afraid that in a few months, the rankings will barely change every week as the rating differences will be greater and greater. Even if a World is doing great in a division for 2 or 3 weeks in a row, it might not be able to climb to the next division.
To forum users: Could you please tell me if I’m wrong?
To Anet: Do you have anything planned to counter this?
PD: Sorry for any mistakes in this post, English is not my mother tongue.