Can we nerf armor penetration already?

It makes no sense how strong it is currently in comparison to magic penetration. Also, I know that there's currently lethality on the PBE but this doesn't affect % armor penetration. Between and the 7% armor penetration mastery, it is possible to reach 64% bonus armor penetration and this is before champion armor shred/penetration which quite a lot of bruisers have access to. By contrast, the only available % penetration effect for magic damage users is and the 7% mastery which together total 40%. Additionally, mages currently have access to around 30 flat penetration from items. By contrast, AD users have access to 50 (late game, as of current PBE state).

Currently, buying magic resistance feels good as a tank - when I buy it, I feel the difference it makes and I know it makes me tankier versus mages. By contrast, buying armor currently feels terrible. The moment my enemy laner gets black cleaver as malphite you can immediately say goodbye to 30% of all armor that you've purchased (and it's even worse for tanks why don't hyperscale in some way). On the other hand, if my enemy AP laner buys - this is the maximal limit of all the % penetration he can obtain and so I any additional MR that I purchase isn't overly diminished. Also, armor itemization has been nerfed to the point that armor and magic resistance items now provide, more or less, the same amount of stats of each point for point. It used to be the case that armor items provided more armor then the equivalent in MR itemization in which case having more % penetration is justified but now an item like provides almost equivalent defensive stats to an item like . The changes from arpen to lethality will stop mages and ADCs getting one shot by AD assassins mid game providing they play correctly but it will do nothing for tanks late game where playing a tank feels completely useless. It's no wonder we saw pretty much zero tanks being played in Season 7 worlds.