In the patch there is: "As a valuable counter pick to tanks in top lane, we’re looking to help Darius"
However 
is also a TANK. So this reason for the buff was very disappointing for me.
Its like: "As a counter pick for adc's we are looking to help Xayah. This buff seems biased.
Moody P5 votesDarius is not a tank
RealDsy1 votesPeople keep saying that which is not true. All he buys is tri and tank items. It means he is a tank.
Hexs Fortune3 votesPeople keep saying that which is not true. All he buys is tri and tank items. It means he is a tank.
When people say tank they mean wardens or vanguards who specialize in applying copious amounts of hard cc, while peeling allies or forcing engages.
Darius is a juggernaut and does not typically function in the above fashion.
RealDsy1 votesYeah if you look that way he has no hard cc. However he builds tank items and can tank in a teamfight like any other tanks. He easily defeat burst enemies since he is tanky.
So its all tank attribution except the hard cc. For me its a tank. Plus his e-w combo is kinda like a 1 sec stun itself. Other tanks havent got much more cc-s.
Stray Kat4 votesWhile Darius is essentially a "Drain Tank" Once you take his Q into account, and the fact that he builds defensivelyish - He's not a "League" Tank. In League tanks (tend to) have hard CC, defensive steroids in their kits, damage mitigation in their kits, Etc.
Darius is actually a Juggernaut - Which might as well be a tank that deals extra damage, except you can get away from him. He's also not nearly as durable as an actual tank, even if he builds purely defensive. As a Diana main I love facing Darius - He can be beaten. Give me an actual tank(Like Mao) and I'm absolutely hosed.
Small differences, and in some games they would certainly all be considered tanks. Here, he's on the fence as a juggernaut.
RealDsy1 votesFor me it seems class system is over complicated. Juggernaut means tank with no hard cc but higher damage. Tank mean hard cc but less damage.
I think there is no reason to separate these two since both rely on tank aspects mostly. They all should be classified as tanks. Since thats the main point. Dealing damage or doing cc is less impactfull than tanking the damage.
I checked so this juggernaut is under fighter class. It should be moved under tank. If you think about it 
much closer to 
than 
.
lolipopevelynn2 votesDarius doesn't tank, he dunks. Its like calling Michel jordan in his prime a baseball player.
DuskDaUmbreon2 votesHe is not a tank. He is a juggernaut.
Juggernauts are low-mobility high damage high durability champions. Tanks are low-mid damage and mid-high mobility, with higher overall durability than juggernauts.