Lets talk about Grievous Wounds
I feel like we should talk about Grievous wounds because right now it is a hard counter to Soraka and any other sustain supports. It was first created so that healing was mitigated. But now healing seems to have taken a different route in the form of healing more at low HP to discourage topping off health. With this new matter of healing, Grievous wounds no longer counters but punishes healing at lower points.
If the Soraka rework is a success it won't matter much when the enemy says, "lol K, I'll just pick Miss Fortune or Varus. Thanks for the free win!" because they counter her healing hard. Even a champion with no ability that applies Grievous wound can pick up ignite and hard counter Soraka with just that. If Riot wants sustain supports to be part of their game, they need to have another look at Grievous Wounds.
If you want to drop your two cents, go ahead. If you want to alleviate my fears that Soraka won't stand a chance even with a new kit. Please do so!
, 
or 
, whose playstyles heavily revolve around being able to heal or regenerate health, Grievous Wounds just denies you from doing what you're meant to do, and takes a huge chunk of power away from you in a manner you can't outplay. No champion should have their core strength completely countered by one single effect (which is one of the reasons why stealth champions suffered horribly when 
and Oracle's Elixir dominated the vision game, as true sight is a hard counter to stealth).
B) It's the reason why some sustain is nearly impossible to deal with: Because there exists a hard counter to heavily sustain-based champions, these champions need to still be able to function somewhat even while under the effect of Grievous Wounds, which translates to a boost to their healing so that it can still be okay even when mitigated. Problem is, as a result, champions like 
have healing so powerful that, unless you happen to have Grievous Wounds, you're not going to be able to deal with it well, if at all. Effectively, this creates a binary scenario in which either you have Grievous Wounds and you win by removing half your opponent's sustain, or you don't and they heal through everything you throw at them.
C) It has no real gameplay: Another issue with Grievous Wounds is that it's typically added as a side-effect to another mechanic, rather than being the focus of the thing itself. If 
activates Impure Shots, it's to outtrade you through attack speed, not through healing reduction, for example. Effectively, Grievous Wounds just piles more power onto spells without making them more interesting or providing real additional options. On top of not providing additional gameplay to the person applying healing reduction, it also has no real interaction with the victim: the only way you can react to Grievous Wounds is by not healing while under its effects, but the healing reduction is always pervasive enough in a fight that you will need to heal or sustain at some point, if you haven't activated your heal/regen ability already. It presents a false choice, since it discourages you from healing but lasts for long enough that you will eventually be forced to heal while affected by Grievous Wounds. There's no real way to make the effect last for a short duration, since Grievous Wounds is already situational and not very appreciable as is (not to the one applying it, anyway).
aren't allowed to be as powerful as they could be. However, I also think Grievous Wounds, at best, just papers over the issue without actually addressing it, and at worst makes the issue less visible and prevents it from being dealt with correctly. Imo, the core problem with drain tanking is that, currently, the resilience of most drain tanks scales with their damage, as does most sustain (i.e. lifesteal and spellvamp), which not only leads to snowballing issues (more damage translates into more "tankiness") but also creates overwhelmingly strong sustain when improperly gated. Drain tanks whose sustain scales with their tankiness would also be tough to balance, since usually tanks die to either burst or DPS and high health + high sustain counters both. The crux of the issue is how to gate both forms of tankiness in order to give drain tanks clear weaknesses and stop their sustain from going overboard.
