This was their "Official" response from the ticket I submitted lol:

"Thank you for taking the time to report your frustrations and concerns about not being able to get into the game due to the worlds being full. We understand that these frustrations are justified, since you would like to enjoy FINAL FANTASY XIV, and this is preventing you from getting into the game. At the current time world population caps are being met, which prevents additional access to these worlds. We are collecting the feedback from these tickets to escalate to the development team, although any change to the worlds or the population caps would be found on the Lodestone (http://na.finalfantasyxiv.com/lodestone/), and we recommend checking there for any announcements.
Final Fantasy XIV Support Team"