A Legitimate Question on Zed

What was the point to his nerf on attack speed? Really? In the notes, it was said the nerf was so he wouldn't split push/clear waves as fast ... but he's a caster. He doesn't attack waves to clear them. He uses his abilities. There is no point in decreasing his attack speed just so his wave clear would be slower.

So again, what was the point of his attack speed nerf? Seriously? If you want him to do less damage to minions late game, then make his abilities do less damage to minions late game. Simple!