It also, if they chose allows them to make an FFXI-2 if they wanted to continue from there. They've successfully wrapped up the story here and could build a new MMO off the setting, considering they left plenty of the game world relatively untouched. Most of the Far East, the Mithran homeland, etc...and could easily use a post-storyline three nations, etc. updated for a generation or so of change. Whenever FFXI finally winds down in it's totality.
I'd play an FFXI where the starting jobs were things like SAM and NIN vs. WAR or THF, etc. etc. set in a Vana'dielian-style Eastern setting.