I'm going to make a series of statement about Final fantasy 13. Followed by a true or false.
Final fantasy 13 had a great battle system. False, it has a good to mediocre battle system that's different. But it is not even the best battle system from the final fantasy series, or even close to the best battle system in a square RPG.
Final fantasy 13 had a original and unique battle system. False, it's a variation of the ogre battle: march of the black queen system. Just rather than giving you a sole role as manager, it places you in the battle as well. So you can neither manage solely or play all the characters decessions properly.