Well this is interesting. So what are we to call this game? 10-2 or X-2? Either way, it's not that bad of a game...
The game play and skill system are more interesting too particularly because A: the skill system actually has a part in the story line and B: it's a lot like the old crystal system with a new name and twist. The dress-sphere skill and ability system is just what the crystal system was just with a cool perk in that you can change classes in the middle of battle, so the job of choosing what classes to have becomes much easier. And just like the crystals, the dress-spheres actually take an active role in the story line. It's the dress-sphere that starts the Gullwings on the quest to find out why it's connected to certain events happening and is used in the ending as well. I will say, It takes a bit of getting use to and a little tactical knowledge but beyond that, it's easy to use and enjoy. It may be a continuation off a previous story but Final Fantasy X-2 can actually stand for itself, without the need of it's predecessor.