Advertisement: Before you ask to revert ADC buffs, remember this.
The reason was pre-8.11 ADC were strong is because supports were strong plus old IE passive allowed them to deal a large amount of damage to squishy targets, making the 2 item powerspike at min 20 too strong for a lategame designed class.
But now, with the supports already nerfed, and this whole new IE passive, critical hits aren't as dangerous as they were before. So allowing ADC to reach their complete powerspike 900g before does not break the game at all. Specially since they probably will need some adittional items to deal damage.
Right now, if you rush the 3 items 100% crítical without Stormrazor, you'll be hitting around 230 AD, which is not a high AD to be in minute 25 (guess that's the usual point where ADC will get those 3 items), and they will need to buy something like Bloodthrister or any AD item.
Considering the game is usually decided at min 25, that doesn't sound to me very problematic. Also, an ADC that doesn't build Stormrazor at all will have several problems to deal damage before their 50% crit mark.
But what's for sure, it's the Yasuo problem. He'll be getting in 20 minutes a powerspike that's too strong to keep this way.
Anyway that's not something I know better than Riot. Probably this applies to you all.