Adding new new worlds is a good thing but, unless the duty finder is causing restrictions to be put on logins, it's only a minor band-aid on the situation. Unless there is an incentive for people to leave their apparently over-crowded servers nothing is going to change.

Sure, some people will re-roll on the new servers but by the time these new servers come out a lot of people will have worked on their characters for 2 weeks and don't want to give that up. Free transfers is a solution but even then people lose the progress they've main with their Free Company. The only "real" solution I can think of is to increase the max limit on logins. If the servers can't handle that, rather than adding new servers, the current ones need to be upgraded or transferred to ones that can.