Before complaining about Yasuo's E change on the PBE...
Remember that they are removing a huge portion of its base damage.
And while they are adding a bonus AD ratio, it is a very small ratio, that does not increase with multiple casts.
Most Yasuos actually start with very little bonus AD during most of the early game. It is unlikely that his E will do the same damage as before until the late game, and it has never been used for its damage anyway.
Don't be fooled however, I hate Yasuo as much as most of you do. I actually think that those changes will solve nothing about his opressive early game (compared to how strong his late game is) and he will probably continue to be a frustrating champion to face (and even OP in the hands of some experienced players) until Riot finally reworks him.