My Idea for a Grievous Wounds rework?
Grievous Wounds: Renamed to Deep Wound. Rather than reducing healing by 50%, reduces an enemy champion's maximum health by 20% for a short time. No effect if their health is below this point, but they cannot be healed above this point until the effect wears off.
It doesn't reduce healing, but it stops it from going past a certain point. Useful for keeping Mundo, Aatrox, Vladimir, and ADcarries in check.
It also is useful to assist burst against a full health target, but assassins seldom have access to Grievous Wounds in the first place.