Before the juggernaut update in late season 5, there used to be 4 sources of flat armor pen. Ghost Blade, Maw of Malmortius, Black Cleaver, and the component Brutilizer. The armor pen on Maw wasn’t even unique so you could stack it.
Plus Last Whisper was only 2300g
PS: Not saying burst isn’t a problem, just pointing this fact out :p
used to have 100 armor
used to have 120 armor
also defensive masteries used to be better than the current defensive runes.
30 points in defense used to give you 4% flat damage reduction. there were a lot more sources or armor and magic resistance in defensive masteries. adaptive armor for example, which turned some of your highest resistance into the other stat.
didnt exist.
used to have 80 armor and slow movement and attack speed of enemy attackers, thus limiting kiting.
marksmen used to build 1 or 2 defensive items instead of 6 damage items where some have resistances attached.
Idk people tell me season 3 was this amazing beast and all I remember is leblanc silencing me and killing me during that time or kassadin silencing my entire team.
I People complain about 100 to 0% hp rotations and CC in this game. It bugs me folks call takeing 2-4 abilitys and/or autos "1 shot" because its not just 1 shot. Zoe casts E Q R Auto Q... yes 100 to 0. but 3 abilitys on cd. NOT 1 SHOT. 100 to 0.
See back in the day 
and 
could 100 to 0 targets with a single cast of their point and click R. Trist ap could 100 to 0 pretty much every mid the second she hit 6.
Now for cc? OMG CC CREEP WTF RIOT ALL THE CC ALL THE TIME!
R lasted 4 seconds.
3 seconds.
Her R used to stun on cast for 1 second. Her Q used to be 4 seconds root maxed and started at 3 second base duration level 1. Last time her Q got a duration change was V1.0.0.83 When garren got released 
Best thing for the game is if players would look at what makes the game healthy and fun, how to maintain viability in a wide # of champions Across multiple MMRs. Far to may folks want 1 playstyle favored, or for a champion to be "balanced/strong" Across all mmrs, even if they have a low or high skill cap.
Buff resistances on all tank items, nerf base damage of tanks like 
etc. so they aren’t overwhelming
i just realized you made a mistake in your op.
cleaver was reworked in season 3. unless you counted that 10 flat armor pen that was on the initial cleaver rework, but didnt that get removed in season 3 still?
