User blog comment:Rezardmaw/Bloodrazor proposed change/@comment-1330314-20160513130411/@comment-26186030-20160514022250

Probably because that would give these champions large ammounts of aoe damage. The main weakness of most on-hit damage champions (Xin Zhao, Jax, Aatrox, Shyvana to a lesser extent, etc.) is that they lack significant aoe damage. That is the main thing that keeps them balanced as per say of Riot, since all of these champions want to split push due to strong dueling and giving them aoe to help them do it with could make them go out of control. The power of waveclear on these champions is one of the main reasons Riot decided to change Rageblade from its initial s6 state to what it is now.