From my ancient post at TNL:
http://www.the-nextlevel.com/board/showpost.php?p=726702&postcount=243
Since nothing has been announced since E3, it's still accurate until proven otherwise.
- FFXII will use what is known as the ADB (Active Dimension Battle) system. It kinda works like Knights of the Old Republic or FFXI. You can move around the field and see all the monsters, there are no battle transitions and your party follows you. When you bring up the command menu, the game pauses and after you input the command the game resumes. You can move around the enemy or even run away holding R2. But after inputting a command, your WTG (Wait Time Gauge) will fill up similar to how a ATB bar would. When the gauge is full, you execute the command (attack, magic, tech, item, whatever). If you go out of range I guess the command gets cancelled. If you are attacking, the gauge will fill again and you will continue attacking until the enemy or you are dead, or you run away, or you change the command by bringing up the menu again.
- The Gambit system is a selection of AI sub-scripting commands you can equip on your characters ranging from 10 categories. They are simple stuff that determine how they will act in battle when left without commands. Stuff like whether to use certain magic, to heal when their HP reaches half, etc. Each Gambit has a ON or OFF toggle meaning you can turn them ALL off. In battles you change control of characters using the L1/R1 buttons even in the command menu, this means you can completely manually command the battles yourself.
- Monsters on the field will each have their own individual type of AI and field of vision. Some monsters are passive and will not attack unless attacked. Others are hostile and will seek you out. Some will run away or even call for backup. There are some monsters that will even heal you if you don't attack and approach them. Regardless, you have to be careful about moving around the field because if you are engaged in a battle and attract another mob, your battle will get larger and more deadly.
- There are no pre-set or selectable jobs in FFXII. Instead you improve what each character is good at by doing more of it. Each character will have certain pre-set skills and base stats biased to certain things. But the more you do something will improve it so you can change the influence yourself. Matsuno said that if a character used alot of White Magic, he/she would eventually be proficent enough to be considered a White Mage in the normal sense.
- There are 8 elements (Fire, Water, Earth, Thunder, Ice, Wind, Holy, Dark) and 7 weapon types (Sword, Spear, Short Sword, Staves, Bows, Rifles, Gloves).
- Any character can use any weapon type, there is no limitation aside from proficency. Weapons have their own levels, so improving a weapon through use will make that even better.
- Swords, Spears and Bows are two-handed weapons. When you equip a one-handed weapon instead, you can also equip a Shield to improve the chance of a guard.
- Attacks can either miss or be guarded. The stats for characters are ATK, DEF, MAGDEF, EVAD, MAGEVAD, LUCK. Presumably Defense influences a guard and Evade influnces a miss.
- Throughout the world of Ivalice, there are many different races. Some will not understand your human language and some just won't want to talk to you. You can only communicate with NPCs with a Talk icon over their heads. It is unknown as of now if by gaining party members from other races if you can talk to more NPCs. In the cutscenes themselves, when races are speaking in another language, it is voiced in that made-up language with accompanying subtitles that look like this: <Hahaha I am an orc, die moron!>.
- The menu for FFXII contains new entries never seen before in a single-player FF. There is now a Map option for you to view area and world maps you already have, as well as a Quest log recording your current (and maybe completed) quests and finally a Handbook feature with logs all the people and places you've seen with notes on them similar to how it was handled in FFT.
- The camera is completely freely rotatable and a first-person view is expected in the final game but not present in the demo.
- The prologue of the game takes place during the invasion of Dalmasca, the game proper takes place 2 years later in 706 B.I. It is currently not known what B.I. stands for but popular fan gossip pins it down to either Before Ivalice or Before Iocus. It is not known if the game proper will take place over several years as in FFT.
- Hitoshi Sakimoto (FFT, VS) is composing the game soundtrack while Nobou Uematsu is composing the game's theme song. It is a love song said to have influenced a slight change in the game's scenerio.
- There is a Battle Chess-like minigame in FFXII currently that is under development and being debugged. It is possible that the game might be removed from the final code if it cannot be completed to their satisfaction before the game is due, but they will try their best to include it.