I think their is, we still have E3 in June which I expect they are going to try and have the new battle system out, as well as the dungeon they talked about in the interviews. However, I don't know if this will happen with everything going on in Japan currently, but that is to be expected. But we have a few things on the horizon for this game:
1. E3 like I said before, if they have some of the bigger changes done by that time, it would be a big marketing push and show off the game and recapture some interest.
2. The One year Anniversary - With the game rounding the one year mark, I'm sure they will try to do something fun for the players, both those in the game, and those who feel like returning to see what has happened after a year.
3. PS3 launch - This is where I think most players will fee that the game is ready, released, out of beta/alpha or whatever people want to refer to the current version as. This date (whenever it happens) will help to relaunch the game to new reviews, and a larger player base.

Anyway, their is time, and I know they are working hard. We'll see how the game shapes up after all of this, and the only one I didn't put in the top three, would be the release of the first expansion (this might coincide with the PS3 release, but for that we'll have to wait and see).