Have they really said that this is going to be drastically different from FF11? Because so far, it looks incredibly similar in overall gameplay, except a slightly different combat system. If that's the case, I imagine it'll be a mindless, slow grindfest like FF11. Grinding is bad in most MMOs I know about, but it was outright horrible in FF11.
At least in World of Warcraft, you can do quests where there's a plot reason for you to kill 12 ogres or find 5 buzzard wings. In FF11, you'd just wait around an hour to find a pickup group that would go into some jungle and fight six-on-one fights against tiny little plant guys that could wipe out your party. Over and over again, for no reason other than to level up so you can kill boring but overly dangerous monsters in the next area.
I'd love to see an actual Final Fantasy MMO that had the depth of plot and ease of gameplay of most of the non-MMO games, but FF11 was a huge disappointment and given how little Square-Enix seemed to care about the many complaints, I'm not really optimistic. But if there's some article somewhere where they acknowledge that a lot of people disliked FF11 and want to reach out to us, I'm more than willing to read it.