Final Fantasy XIV's Yoshida Fields Community Questions in Live "Letter from the Producer" Video
Yoshida answered a number of questions for fans. Some of the key points include the possible creation of a party forming system, a revamp of the Linkshell system, the addition of more jobs, the new class system, PvP and a lot more. The full video is conducted in Japanese and is available via embed after the break complete with super speed English subtitles. But if sitting through the 90-minute video isnt what you had in mind, there is a summary on the official Final Fantasy XIV forums.
Source: Final Fantasy XIV website