Quote Originally Posted by Volsung View Post
/sea was a feature that was included with the games release. This new recruitment/search feature was built upon as the game went free to play. /sea was then removed. This was done because SE did not want players to be able to see the population of the servers. I believe they favored the current system because it does work (though its lame) because you are unable to ascertain the population playing at any given moment.

There is a chance we may get it back when PS3 is released (or when they come to their senses).
FFXIV never had a /sea command. The world population was just displayed when you opened the party window, which was later removed.