Indeed. As it is now i wouldn't be surprised if the advanced class that MRD unlocks was exactly Viking, which does exist in FFT serie and really fits the current MRD more than pirate. But part of this is because viking actually are pirates too. =P

Viking actually would be a perfect advanced class for MRD. I like specialization trees, but lets assume it just unlock mixed classes of current ones...MRD could be the base for Dark knight (MRD+THM), Warrior (MRD+GLA) and Viking (MRD+CON).