% Armor Penetration on Adc's

I think giving % armor penetration on AD Abilities would be great. With the high pick rate of champs with black cleaver builds it would soften the impact ninja tabi has on a adcs. Most top laners have abilities that deal true damage, % hp, armor reduction and so on, But crit adcs have nothing. Especially with the inconvenient build of Hurricane and IE which is so expensive its a long time to get any armor pen without tanks getting 2 or 3 armor items. I usually have to just build lw before finishing IE.

The link is just a fed graves abused damage reduction from flat armor, PD, challenging smite etc. It's fine whatever he is and I can kite melee tanks right, but it doesn't change the face that armor is too strong in the mid game. It honestly makes alot of games one sided to the point where if top is ad and loses the game shifts to whether we can play around the Ap champ. Versus if bot feeds top and mid can both have a chance of salvaging the game.