I feel like Riot doesn't like tanks anymore...
I mean, they made ADC's able to kill them so much easier with the new LW items because they're punished for building more health and armor, they're making true damage and %healthdamage super prominent, they're nerfing tanky items and buffing and making bruiser items and even items that give tanks damage(DMP, Titanic Hydra, Sterak's, etc.). Its like they just want damage now and tanks are only there to make building Zz'rot look viable and keep ADC's safe/get them fed in the laning phase.