No, no command styles in DDD. There's special attacks that depend on what dream eaters you have but that's about it.
I would not be surprised if keyblade transformations have a system similar to Re:Coded however, when you get certain..finishing moves..by keeping a certain keyblade equipped and getting experience on it...in KH3 however. (I have a sneaking suspicion that was foreshadowing, either that or the embryo of what is being planned. Would make sense, if you think about it.)