Yasuo and co being broken can be a good thing
Abusers of broken AD champs are now getting used to stupid yolo roflstomp gameplay with bloodlust mastery and the new items, so when the balance actually hits (just before 6th season expectedly) it'll be much easier to beat them. It's like you play against bots and can do what you want and then you come to ranked and get punished for stupid things you do.