Both Everlasting and Excelsior have thriving, busy populations. The other three servers are near ghost towns. Doing a special event to help build them up is objectively a very good idea. Consider having a population that you can find a team with at any hour to be a year-round celebration.
Every character I have is on Excelsior, and I appreciate Torchbearer, Indomitable, and Reunion getting events to build them up. They need it, we don't. Just my two influence.