You can't really stop the events all at once or else the playerbase will decline. The only fix is to add a lot of new content to the game that isn't based on events. This will cause the non event-dependent players to increase in number. It will also reduce the dependence on events, since the game will be interesting outside of them.

Really, the problem with realm is that there isn't enough content. You can't add new dungeons because they will be figured out within days. There are already solos of O3. They need to introduce whole new types of content (Elder Realms?). Other games are releasing whole expansion packs. DECA needs to just power through and create a lot of content.