Don't nerf kog maw just because his winrate is high.
his playrate is 1/8th of ashe and jhin. that just means his playerbase are playing him for the most part. not someone picking him up in a cpl matches and spray and praying the enemy team into oblivion. he has clear strengths and clear weaknesses. probably the most immobile adc while being extremely squishy. and no hard cc like some others that don't lack in other areas
just nerf soraka shes back at it with a winrate just as high before grievous wounds changes.
will no doubt return to power and will resume crushing Kog