My biggest current feedbacks (may come back and lead more) is that the hitbox on the main attack is hit or miss, there isn't always a guarantee that your slash will proc damage. I'm not sure if this is intentional or if the hitbox is just wonky - as sometimes it hits when I'm directly in front of an enemy and sometimes it hits when I'm to the side and in front of an enemy.
That and also I would for consecutive defeats to the same enemy in one expediction, have alts and variants to the fluff text (not the animation, that can stay the same), in order to make it not only worth reading again but also fit with the flow of having already been defeated by that foe once. Alongside that, an option to skip a cutscene like that on the off chance you were trying really hard to win and accidentally got got would help reduce some frustration for players.