@Riot Axes about your comment regarding towers and penetration.

> We've actually been tweaking rules to open up tower killing to more classes for a while - for example, putting armor/MR on towers and allowing penetration to work on it at midseason - in the hopes that something like this would eventually happen.

Everybody knows that penetration builds like those centered around lethality and flat magic penetration aren't really performing as good as other build options like crit, raw AD/AP, CDR etc.

And as you mentioned, towers having 0 armor and MR to instead have a ton of health makes it just another reason to not go for penetration builds, since of course there is no armor and MR to penetrate.

But judging from my experience with penetration builds there is an even bigger problem - minions having no MR and armor, aswell as the majority of jungle monsters.

This alone prevents champions who want to build penetration from actually taking it in their runes. To not have an extreme disadvantage to your opponent when it comes to jungle clearing or simple minion farming, you can't really take lethality or flat magic pen runes to not have an extreme disadvantage in the early game, which after all, runes are supposed to be strong in the first place.

The only real exception to this rule are flat magic penetration marks - and only really because there aren't any other good options as marks for AP champions, you can't go for AP marks or CDR marks for example.

What if we give minions and monsters armor and MR and just lower their health in return? For anyone who doesn't buy any penetration, the damage they'd deal to them would be the same while for champions who take flat magic pen / lethality in their runes they won't have as much of a disadvantage anymore.

Several Rioters stated already that they think that lethality builds are somewhat underperforming right now and now also that you want to change tower MR and armor to make them better. While you're at it, you might aswell do the same with minions and monsters, because running a lethality page just feels so bad for the early game right now.