Still waiting on the context of why Kayle is receiving random nerfs
Kayle is perfectly fine right now and changing her E cooldown will make her ability to CS much harder, prevent her from putting points into other abilities, and make her way too vulnerable to her opponents. Base AD nerf makes no sense at all and hurts her ability to CS.
https://www.op.gg/champion/kayle/statistics/top
You can even look at the stats. Why does Kayle need a nerf?