We plan on adding an advanced "prestige" directive tree to many of the existing directive trees that unlocks after you complete them. Example: You complete Heavy Assault so then you unlock the Stormtrooper tree that has much harder and less general things to do. That tree could of course have different rewards. In the case of the Heavy Assault it would probably be the ES Heavy Assault guns (Lasher/Jackhammer/MCG). In the case of Medic / Engineer we might look at the Medical applicator or Repair tool variants. We'd definitely get feedback from players on whether they wanted those sort of rewards though.