Additional Movement options and flexibility
Maybe some movement options would change up the main game, Like turnable elbows,something like this could make upper-cutting easier. Turnable legs, additional flexibility for official game modes( i can extend my left arm behind me and contract my right pec so my right arm is in front of me, but Tori cant?), and a strength modifier for your joints (say you drag the joint a distance and it increases the speed of that movement.). Running could also be made easier by these additions and wont require a master's talent while still maintaining difficulty.
Also for quality of life, maybe you could record preset fighting moves to employ in battles.