"With this one change, we're hitting two birds with one stone. We're weakening Kai'Sa's late game isolated burst damage, but bolstering her ability to stave off her enemy's attempts to push her away from minion waves"
That's an awfully generous interpretation for a straight nerf
Something got lost in translation here; the line should read "We're weakening Kai'Sa's late game isolated burst damage and bolstering her opponent's ability to push her away from minion waves in lane". The two birds are early and late game, not strength and weakness. Working on getting this updated!