Is there any way Grievous Wounds can be a non-toxic mechanic?

Grievous Wounds has been getting removed left and right as of late (MF lost it, Fizz lost it, no more Executioner's Calling, etc.), leading me to believe that Riot feels the mechanic is poisonous to gameplay. They're probably not wrong, either. 50% healing reduction absolutely murders certain Champions ( ), while having little effect on others, and the fact that GW only applies the healing reduction at 50% (and never another value) means it's presently inflexible to balance changes. Plus there's no practical counterplay to it; QSSing a GW effect simply isn't done, and since it's not considered CC, it isn't removed by Gangplank, Alistar or Olaf.

I suspect Riot intends to simply do away with Grievous Wounds altogether and just scale back the power on some of our mega-healers, but I could be wrong. Maybe if the healing reduction were based on how much health you have (i.e. strongest when you are healthy, weakest when you're almost dead, or vice-versa), it could have a more acceptable place. But as it stands right now, I wouldn't be surprised if Katarina and Varus soon lose the effect on their respective skills.