Quote from Tropa;1295136:
Thoughts on the Mage and Dragon update in the next patch?
RIP Merc Scimitar. That's all.
They better come up with a solution to this. I get that top laners abused QSS to deal with Trundle, but at least keep the effect on the completed item...
Let's see which champions should be overjoyed with the QSS nerf (listed from the obvious to not so obvious):
Zed (Death Mark uncleansable)
Vladimir (Hemoplague uncleansable)
Trundle (Subjugate uncleansable)
Mordekaiser (Children of the grave uncleansable)
Tristana (Explosive Charge uncleansable)
Kalista (Rend uncleansable)
Anivia (The chill debuff from her Flash Frost; before you could cleanse it to get reduced damage from Frostbite)
Darius (Many people don't know this, but you could cleanse Hemorrhage, and best time to do so was at 5 stacks for obvious reasons. There's a reason why Darius isn't considered a meta pick anymore, because he is able to be abused because of his low mobility and low cost of QSS that will make his ult deal way less)
Malzahar (Not the biggest issue against him, but his Malefic Visions also used to be cleansable. The PBE change won't allow that. It's not that big, but when his Malefic Vision is strong enough to be a threat, it's concerning.)
Nidalee (Prowl could also be cleansed. Having QSS for this was actually a big deal since you could reduce the damage by a lot)
Quinn (Harrier is also cleansable, but this isn't probably that big of an issue. It is a good thing for Quinns that are ahead.)
Shyvana (Flame breath is also cleansible, also Challenging Smite)
Master Yi (Challenging Smite)
There are way many others I can list, but not that significant in terms of balance IMO. For example, you can also cleanse Urgot's Noxian Corrosive Charge, but who's gonna play Urgot and actually use to cleanse that instead of his ult? Another one is Twitch's Deadly Venom passive, but won't matter too much as he'll probably be able to stack it again or just die before.