I wouldn't be surprised if they used some variation of XIII's system for the sake of new fans who probably didn't grow up with classic ATB. To be honest, I wouldn't be surprised if they tried to rev up the speed and chose the make only one character playable and the other two A.I. controlled a la FFXII/XIII/Type-0. SE has been kind of moving away from "traditional" turn base beyond throw back titles like Bravery Default.