"No longer reduces damage taken from critical strikes"
Why? 
Why? 
I don't really know. As a tank main, I never bought it anyway.
If you weren't buying this item often, you weren't building optimally especially if you have a strong engage. Randuins plus tabi = 22% damage reduction on a full crit yasuo. I built it for jhins, yasuo's caits, dravens, jinxes, and basically anyone who built an IE who might also build a LW item.
So not only do you get that massive flat % damage decrease, you slowed attacks by 15%.
THEN on top of that, it had the best raw stats of any other armor+health item
AND that aoe slow....
unbelievably good item.