Still a few issues I would like to address

So penetration might be taking a hit and it obviously deserves it, however it's a nerf for broken champion, so I wonder what will happen to champions that are already sub par when they take an item based hit?

Why are AD champions still so ridiculously strong? Playing against a full ad enemy gearing up with lots of armor and still getting shit on and instakilled, what's the use of building armor instead of going full ham damage and hope to kill something before it kills me?

I'm currently in a bit lower elo than I was last season, however many of my laning opponents are so so bad, they can't farm, they can't hit me with anything while I hit them with nearly every single ability, but I'm an AP mid playing vs AD mid champs that don't need anything but hit 6 or get a certain item and from that point they can sneeze me to death (Zed, Talon, Jayce in particular. Honorable mention for Yasuo he needs just a couple of levels more). I'm pretty sure that even if things get more balanced for the new season, there will be so much chaos in nearly every elo because it will be filled with people that took a ride on the broken AD train and got themselves to Gold 1 on something broken and now they're in your placements and elo for the first half of the season.

Here I am 30 farm ahead level 9 farming my mid lane, wards in the bushes, flash up, zhonya's up, exhaust in the pocket. I'm just about halfway my lane. My daughter stands next to my chair calling my name, I take a look at her and look back at the screen... Suddenly I'm in dead, without even being able to flash, exhaust, zhonya or anything. What happened? Zed flash ulted in and killed me. I look at the death recap 0.38 seconds of damage. Shit I'm so bad. It takes a human on average 0.283 seconds to respond, that means I had a full 0.097 seconds to respond and with my ping at 16 that means I had 0.081 seconds to respond which should be more than enough right?