The director and producer shared a few precious details on the game's control scheme. The game will make use of both the Wii-mote and nunchuk. However, as noted previously, the development team is attempting to keep the controls simple. While not providing too many specifics, the control scheme might alter slightly based on the current situation. The team also noted that the controls are now being fine tuned to make it easy to perform attacks while moving.
On the topic of the battle system, the team mentioned that characters will make use of the "abilities" that they have in order to fight. You'll also be able to make use of standard weapons.
Crystals will come into play as well. One scene in the trailer showed an energy force of some form emerging from the main character's hand; this has something to do with crystals.
All the basic elements of a Final Fantasy game will make it into Crystal Bearers, giving specific mention to air ships, chocobos, magic and monsters. They also provided a hint that you might be able to control airships on your own.