WP has a history of making unnecessary new servers. When I heard about the new server I was surprised. I haven't played in ages, but I logged it to take care of the event storage stuff and I noticed the channels weren't remotely full, not even channel 1. I don't even think the community was calling for a new server.
Usually mmos make new servers when there is a growing population and the servers can't handle the influx. Gravity, on the other hand, makes servers for stupid reasons like a small group of people wanting a "fresh start" hence part of the reason Ygg was made. Gravity isn't logical.