Lethality RUNES need a nerf as well

So we got lethality mastery nerfs on the PBE and also got ghostblade nerfs there too. Good! However, we still got a pretty big unaddressed source of lethality: runes. You can currently get access to 24 lethality on only reds and quints which is almost equivalent to 2 completed armor penetration items. By contrast, magic penetration reds and magic penetration quints give a total of 14.8 magic resistance, equal to approximately one flat magic penetration item. I understand that lethality runes need to be stronger than magic penetration runes because they're of a scaling nature, but what was wrong with the values they had before the last buff? Please look at this!