The little post-2.0 knowledge we have about Meracydia is that the Allagan war turned nearly the entire continent into a giant wasteland and even today there are parts that are uninhabitable while the few that live there attack all outsiders.
In 1.0 there was a little more knowledge about them, but whether or not that's canon is a different story. In 1.0, there were witch doctors who were mentioned in leves and you had to gather or craft things for the Limsan traders to send to them. Other tidbits of lore describe the people there as "primitive tribes".
All that can be retconned, but as of what we know now, there's not really any reason to go there and nothing to see unless the writers throw out some old pages and fill in some blanks.