the sam have the potential to be extremely usefull in group, where other will bring utility and raise the capacity of the group, the sam will be focus to gather this utility for transform it in raw power.
a point important to note, the sam have no self buff like most of the other dps. means outside the three self buff (slash resistance, speed attack and damage buff...what the other have generally too) they have no buff, all them power is directly put in the potency of the skill...

i think with time they will add more tool for adapt to different combat and that will be maybe the sam way to evolve be versatile with a high raw power that can turn into a destructive force when with a group that can buff him.