Did they nerf Kai'Sa?

Despite the recent buff, Kai’sa remains weaker than expected, especially late game for a marksman who is supposed to hyperscale to make up for her short range. We’re tapping up her scaling to help her output as she nears her final form.

• > Passive - Second Skin · Caustic Wounds: 4 - 24 (Champion Level) (+12% Ability Power), +1 - 6 (Champion Level) (+3% Ability Power) per prior stack ⇒ 4 - 30 (Champion Level) (+12% Ability Power), +1 - 8 (Champion Level) (+3% Ability Power) per prior stack