Obviously I'm not SE, but they probably don't want to add new servers because in a few weeks once things calm down a lot less people will be playing and they won't be necessary.

If they add new servers they risk them not filling up and in fact they already made that mistake before. Omega was launched 2 years ago and it was very popular. However a few days later they quietly added another server (Louisoix). Sadly though because noone knew they were going to release two servers (at different times) most people who wanted to transfer to a new world had already transferred to Omega (and were locked there for 90 days!). From what I understand it took Louisoix's population a long time to catch up with all the others.

I saw someone further back in the thread say that the servers obviously aren't that full as the login queues aren't that big, but if you're getting login queues at all then the server IS full. Allowing people to create even more characters on those servers is just reckless. They won't be running the servers to 100% capacity, but by now they'll have worked out what their "safe" limits are so they'll be working to those limits.

Sorry, but just need to be patient