Rollbacks never work, is better to reset before doing a rollback. I am not sure how big is the problem since i don't play Classicus anymore but resetting is not a good option. Here is a selfish suggestion in case you guys are considering a reset or need to reset for some reason. Host an US world too but you will need to reset the european server to avoid people migrating from the european just because the US server is new. This way Latin Americans can play with an stable latency/ping and both servers will be fairly populated fixing the crowded hunting area problems.