What Riot considered the nerf to AP Kog'maw
"A few light touches should get both flavors of the void puppy to a stable spot." "for mage Kog, that’s pulling some excess waveclear out of his lane phase to keep him on his toes."
"E - Void Ooze DAMAGE 60/110/160/210/260 ⇒ 60/105/150/195/240 RATIO 0.7 ability power ⇒ 0.5 ability power"
So apparently reducing the AP ratio by .2 would be one of those "light touches" intended to reduce his waveclear during the laning phase. I can completely understand reducing the base because that directly hits the early game hardest, and keeps the late game fairly similar, but reducing the AP ratio by .2 is a massive hit to his mid and late game burst and waveclear.
Why can't they just take small steps when balancing other champions than just their favorites?