About the rengar nerf
Alright i know the comunity hates the champion and the adicion of thunderlord didnt help him much. Despite that, rengar's winratio (in high elo at least) isnt that high, its about 50% which isnt at all allarming, adicionally the pbe nerfs will turn rengar into a bruiser which i find sad since he is meant to be an assassin. Thunderlords is the real problem and not only on rengar. Sure he is hard to deal with if he is fed, every champion who is fed tends to overperform which in rengar's case means more killing but there are reasonable counterplay options, there are pinks there is building a defensive itens and there is grouping up. Hitting his damage means he might jump to a carry fail to kill him and just die miserably due to lack of escape making him kinda useless.
I really dont think nerfing a champion out of hate is good principle thats all