There is a cool orange trait for accessories that allow players to have a chance of not using a consumable, like a healing item, a grenade or a potion.
I think one change to this ability is needed: Usually, when you use one of these items, the game automatically switches back to the weapon you were previously using. Except if you have this trait (Only happened to me with heals, though). Then it remains with the item in hand. Is this a bug or intended behavior?
The other change would be to tie that % (currently a fixed 25%) to player level, so that lv 30 players have a slightly higher chance of triggering the skill without unbalancing it too much. It would also encourage lower level players to level up their charas. After all, this is designed for mid-high level gameplay, being an orange trait.