Like you said, you can't slash through hordes of bodies metal armor and all, in a single swipe, unlike you see here regularly, people really underestimate how tough bones are, especially bones in strong healthy individuals.That is even worse than the jumping IMO. People in this comic have supernatural strength and abilities, just how it is.
From what I understand, in battle its trying to find the right balance between breaking through the enemies armor, and targeting weak points like eyes, neck, and belly as well as slashing bleeding wounds and cutting muscle without your weapon getting stuck in your victim leaving you exposed as you pull it free. That's why swords are good for large melee battles, you can slash without risking your weapon getting stuck. Compared to spears which probably are basically one time per battle use.
Also, soldiers fighting so much tougher because a great general is leading them is silly too. Morale can only go so far.
Edited by truepurple, 09 September 2017 - 04:00 AM.