This game, other then Sahz, is pretty bad. At best I would give this a 6 or 7 which is really bad for a FF game. I haven't been this disapointed since FFIX which I also disliked.
The battlesystem is OK, but I preferred the make your own characters what you want approach of FFX, FFVII and others. What's the point of having an XP grid if you're going to make all the choices more or less static? Losing access to all abilities until you switch classes to a limited number of choices also sucked, as did not being able to give directions to your team.
You don't HAVE to make it menu based to have choice over your teammates, just look at Mass Effect, Dragon Age and others. Just let people use a radial menu to occasionally force 2nd and 3rd character actions and leave them on auto pilot the rest of the time, simple.
As a 2nd big thing all the characters either sucked or REALLY sucked, except Sahz. Lightning was like a boring version of Celes, Snow was a REALLY lame caricature of Western tough guys, Fang was OK I guess but I have no idea why we cared about anything she did....and don't even get me started on the lame ass kids. Seriously if you're going to virtually eliminate ALL OTHER CHARACTERS, at least make the main characters not suck.
There was more Charisma and interesting personality in a single bioware character like Alister, Morigan or Wrex then in the entire cast.
I think I might just be jaded by WRPGs though, I've just come to expect more. I've come to expect choice, great voice acting, interesting characters, realistic settings even in fantasy works, freedom....
In current gen at best FFXIII is 7th after Fallout 3, Oblivion, Dragon Age, Mass Effect 2, Mass Effect 1, Neverwinter Nights 2 and I'm sure I'm forgetting others that were also better.
The series peaked at 6 and 7 which were both good in different ways, had another high point at X and have more or less sucked since. I remember how great FF 1 was when I first played it back in the 80s, it even was better then all the WRPGs of the time, especially among the pathetic console competition. How things have changed over the last 20 years.