Here is what Anet said:
"We will be resetting glicko volatility and deviation for all worlds to the same value, but leaving their rating unchanged.
What this means is:
The first matchup will use current placements (T1 worlds vs T1 worlds, T2 worlds vs T2 worlds, etc.)
The reset volatility and deviation values will come into effect at the end of that match.
Worlds that win, especially by a large margin, will have their rating increased by a larger amount than normal.
Likewise, worlds that lose, especially by a large margin, will have their rating decreased by a larger amount than normal.
The result is that when a world no longer is meant to be in a specific tier, they’ll move out of it more quickly."
This week we are paired with Fort Aspenwood, they are Tier 2. So, we have opponents that are in Tier 2. If we lose by a larger margin (Likely) we will move out of Tier 2. Next week we will fight against foes of a lower tier. If we lose again we continue to descend until we reach a tier appropriate for us. Then we can expect to take second or first and stop our descent.
This will repeat every 2 months after a server regrouping. The weeks when we are up against the top tiers and getting stomped are hard, don't get discouraged, don't despair. If we grow our numbers and raise our skills we will be able to hold our own against higher and higher tiers. I hope that knowing how it works will help you through the tough times.