Ironically enough, 1.0 actually had this - as the player could start the game as a Disciple of the Hand or Disciple of the Land, story battles actually compensated for this, such as having npc fighters doing most of the fighting in the single starting nation boss fight (all the player had to do was issue commands to them), and joining the Path of the Twelve gave the player access to a personal npc fighter for story battles called a Path Companion. There was also the silly Parley minigame which the player could also use as a form of mediation in a boss fight to actually try and convince the enemy to give up without fighting.
Naturally, none of this worked very well. Still, it was a brave attempt to give non-combat classes a chance to actually participate in the storyline, even if it didn't quite work out as well as it seemed on paper.