Kindly avoid doing to Pyke what you did to Ornn and Galio
This could be applied to any new champion or rework really, but still.
It is pointless to buff a new champion within the first month on the live servers. People have to get used to it and become experienced, it's not unexpected that the winrate of said champion will be low. Give the community the time to adjust and then tweak what needs to be changed. No champion deserves a 46% winrate.
I'm fairly confident that this won't happen, Kai'sa and Eve are in a fairly good spot after all. It's probably a matter of personal taste but gutting a champion with such a cool concept sounds like a crime to me.

and is going to need some buffs.