aim, dodge and hp have the biggest impacts in dueling so they figured its more then enough
you think charisma is stronger because it doesnt have a 'jobless' skill, its weaker actually because then you cant use charisma attribute to get free bonuses, since its essentially wasted points for anyone that isnt a pure dueler, Also Charisma not having a jobless skill, its because charisma has the least impact on your dueling, so its meant to be more of a jobbers attribute
Things I noticed from that data you gathered
Hiding and Trading seem to be intended to be the best job skills
Swimming seems to be the most underpowered skill
Stamina and Traps seem to be the 2 to pick if you wanted most versatility in jobs but Stamina in its current format is easily one of the weakest job skills because of the lack of doubles