Tank items are not too weak. Damage is just too strong.
I say this because remember the tank rework era when tanks were too op and could soak anything. Zac, Maokai, and Sej got reworked. Along with them the tank items also got changed, mainly they all lost health but received more armor/magic resist. Although it seemed to have helped reduce tanks’ durability, they were still too strong.
But everything changed when season 8 came along. Season 8 skyrocketed damage by adding runes reforged and increasing damage of items. Then Conqueror came along and single handedly kicked tanks out of top lane. Now we’re at a point where nearly everyone dies at the same amount of time. If anything life steal champions feel like the tankiest champions.
The reason I’m making this post is because I don’t want to see tank items buffed because damage items were buffed to reduce the power of tanks. The last thing we need is an arms race of buffing damage and defense back and forth. Let’s just reduce damage. Starting with these changes:
Nerf amount of AD in certain items like Infinity Edge.
Reduce CDR in items or get rid of problematic items like Spear of Sojin.
Reduce or remove scaling on keystones so players don’t stack AD/AP to maximize their keystone damage.
Change last whisper back to bonus armor instead of total armor.
increase gold cost from 2900 to 3500, take away 5 armor and 50 health. Now gives +5% armor health and mr, stacks linearly with similar passives.
and 
both of its items
