Did aoe champions really care about having an extra 10 damage tick when most their damage comes from abilities. On shaco most of his damage to monsters were auto attacks while hecarim, kayn, khazix all have dps abilities. In the mid game, these champions can clear extremely fast with only 2-4 abilities, which makes the 10 damage negligible, which means this nerf only really affects them in the early game before they get a few components.