A very serious suggestion.
What's the deal with letting everyone get 100% crit chance? I thought the whole point of critical strikes was that they were supposed to be a lucky RNG based burst in damage. Instead we have this clown fiesta that is 100% crit builds with IE tacked on where people are literally one shotting the enemy.
In my opinion reducing overall crit rating across the board and making it impossible to get 100% crit chance would bring back a lot of the health this game once had. Think about how many other games you've seen where it's possible to get 100% crit chance... Not many come to mind for me. There's a reason for that. 100% crit chance is bullshit. Stack on an item that INCREASES your crit damage even further on top of that and you have your REAL balance issue.
TL;DR. Riot, it's not your champions that are the problem it's your stupid amounts of crit chance that throws your game out of whack. Fix this please!