Around 95% of the playerbase don't actually know how to do Riven legit, so literally all you would really need to do to make it "tough" is simply just block the ability to use the cheese, forcing you to do the fight properly
Considering the fight normally is one of the hardest and lengthiest fights in the entire game, it'll be a really funny way to make the fight "hard" without even changing anything at all
Part of me thinks they may actually keep in the cheese, but the score needed to actually get platinum won’t be possible with the cheese as there may not be enough ads.