Please provide some sort of ability to counter grievous wounds

Say you're playing Soraka. Every role (except support, I guess) has an item they can build that can instantly shut you down to half efficacy. Mages can build Morello's, ADCs can build Executioner's Calling, and tanks/bruisers can build Bramble Vest. I'm fine with Morello's, but the other two grievous wounds items cost less than a thousand gold, and (with some small variation at times) are often easily added to their build anyway.

Bramble Vest was an item designed to stop ADCs with lifesteal from using tanks as big walking sacks of hit points. Executioner's Calling is to stop drain mages from being completely dominant in the late game. But in Solo Queue, when you can't tell your ADC "Hey, stop attacking the Malphite for one second so I can heal you", Soraka becomes little more than a glorified Ocean Drake, where it's only really worth healing them out of combat. This especially hurts when your ADC has a Runaan's Hurricane, and may accidentally tap the Malphite every time they attack.

For this, I have two proposed solutions: A) Give Soraka (or other supports) the ability to cleanse grievous wounds. Maybe just an added buff to her E, where allies who stand in the circle are immune to grievous wounds, and then more time equal to the duration of the root. This gives you the ability to react and be useful in the middle of a teamfight, but you have to make an impactful decision.

B) Change grievous wounds so that the first instance of major healing (say 10% or more of their max HP) removes grievous wounds after reducing that instance of healing. This is so you can do a quick W-R combo on Soraka in the middle of a fight without it only restoring around 400 hit points.

Generic statement about Ardent Censer needing nerfs