There's so much damage around that only tanky champs are viable
You know when
reach 55+% win rate something is up. There's just so much free damage on everything - new masteries/item passives/etc. that only tanks can survive it while still being able to dish out damage from all the free passive damage.
are rising just to combat all the tanks at the top while having enough health to survive.
This is also the reason why


and other AD or on-hit assassins are being contained right now - otherwise they'd be running rampant and melting faces.
TL;DR Riot is going to have a hell of a time trying to balance this season

