Hey,
i was just doing the Sakum's Impact Quest in Ruins of Despair when the servers went down.
Now that the servers are back up i noticed, that my overall Quest Process vanished.
During the Quest you need to kill 3 types of mobs. I had just one or two mobs missing but now, i need to start each type from 0. Even though my exp is still the same as at the time the servers went down.
Not that it takes much time to repeat the quest but maybe other ppl 85+ got the same problem and it would hurt them more, starting some quests from 0.