I have to agree that I don't appreciate the reset of these achievements. I've been away from the game for some time due to real life business and concerns. When I logged in it was for brief moments, and not enough time to really get into the game seriously. I returned a little over a week ago and discovered there was an event going on. I did my best to complete much of it, and came just short of completing the Champion and Eternal level ones. Had they kept the information for a later date, I'd have been willing to achieve this in the future, but since it is forgetting all my efforts, there's no way I'm going to crate ANOTHER 8 characters and try to grind this again. That would be a huge headache I'm not willing to regrind. Its a shame they went this route. I can understand locking the achievement til they choose to pick up the event again, but wiping it out is just a mistake altogether. I really don't understand the thinking process behind this. (Then again I'm not such a large fan of Events in general on any MMO I've played in the last 10 years. All the best events in my view were player driven. Make the game fun and we'll find humorous ways to entertain ourselves, like trying to see if we can beat a boss using only certain abilities, etc.)