In DW4 and DW5 we were given characters with almost identical movesets and weapons. For DW6, I propose this be changed. A completely new set of weapons could be given to each character, including symbolic ones that appear in the novel (whips and parasols come to mind ). For those characters who's weapon wouldn't change, their moveset might undergo a complete alteration. Here's some examples:

-Cao Cao, being the militaristic authoritarian that he is, could wield a bladed whip.
-Liu Bei could carry two sabers rather than his one sword.
-Gan Ning could be given a ball and chain weapon, similar to the one he used to scale the walls of Huancheng in the novel.
-Sun Quan could either be given a parasol, which he appears in the novel with a lot or could be given a moveset that focuses more on lightning attacks (for instance in one attack, Sun Quan could send a shock ray from the tip of his sword into a cluster of enemies to electrify them.
-Etc.

I think a moveset change for most, if not all, of the characters would keep the game more fresh and less repetitive.