This is how the damage should have been kept for all lol's history
https://www.youtube.com/watch?v=LTOxYbm4E4Y&feature=youtu.be&t=335
That was how the damage was back in the days... lvl 5 brand combo + lvl 5 rammus ganking lvl 5 irelia would never kill her but only put her 1/3 life with the possibility of escaping !
Nowadays that's impossible. unless you play an actual op character. The new irelia would survive this because she is op. but took other actual characters or old irelia in this situation in the actual meta most of them won't survive.
In my oppinion i'm okay with most of the changes except for the jungle and the damage. And i think that damage is the main reason why people are getting salty and angry on the boards. Seriously if i'm one shotted without having any possibility of escaping i will be mad however if i don't get one shot but killed after short fights i would say to myself well he is better or i havent been playing safely enough.