Kai’sa should only evolve 2 abilities max
Kai’Sa‘a evolution passive is quite a strong mid-late game, and how easy it is to evolve all of them.
Nerfing her passive, so that she could only evolve 2 abilities, instead of 3, allows players to build against her properly and also create “healthier” builds (rageblade will still be annoying but this makes players either go for an ap or ad build rather than going both, and also allows enemies to build defence accordingly).
This also allows to adjust numbers on how long till an ability evolves as well if the nerfs go well.