1. Bring back the Crisis Events exactly like they were run in the past. No changes needed. A lot of players have never done these events. So, it will be new content for them. For older players, they can ignore these events if they want.
2. Bring back the End of the World Event on a yearly basis, EXCEPT, allow players to earn Event Tokens so they can get rewards from the merchant INSTEAD of having server rewards. Another point, this is the only way to play the End of the World adv.
Both of these events are minor events unlike the Easter, Christmas, and Halloween events.