Hard to judge 12 voice acting. Much of it is delivered dryly without any emotion, but it seems like it's written that way too. It's certainly a bad overall result, but I'm not sure I can blame the acting per se.

FFX easily has better voice acting overall though. The exception is Yuna because of the absolutely ridiculous pace they had her deliver her lines to try to match the dubbing up. That was a terrible choice which I blame on the direction and the translation more than the actress.