Nomura has never directed a Final Fantasy before, whereas Tabata has directed Crisis Core and Type-0. Maybe Nomura was making XV too much like Kingdom Hearts? There would have needed to be some differentiation between the two, or else queue the "IS KHIII A RESKINNED FFXV?" articles would start popping up after KHIII's launch in X (XX?) amount of years. The internet can be very predictable sometimes lol.