Before you roll out Darius on the PBE, please read this.
Darius's lore clearly explains he is the most feared, and battle hardened warrior. - taken from the first sentence. In the lore, it clearly shows he decapitates a captain, and his soldiers are terrified, and inspired. This is not how Darius is shown in his rework. Darius is shown as a brute, who will do anything in his path to destroy anyone, and is a rage induced monster who is sluggish, and slow. Darius strode towards the captain, and DECAPITATED HIM.
Haha, funny thing is. This guy can't strode towards anything, he is now a sluggish tank, that will destroy anyone who comes close, and is rage induced by blood. Darius should be a tactical fighter, and not a sluggish rage beast.
Darius's new part of his passive, Bloodrage gives him insane amounts of damage, but he is slow. You make his Q 0.75 seconds cast time, which is insanely slow, and almost destroys his kit. Then, you make his Q go more on AD, so he has to go for more damage items to be effective.
This rework is a failure in the face of Darius.
I could easily make a rework of my own right now, and fix Darius up so easily, and well done (imo). Watch.
Darius's Passive: Hemmorhage Darius makes his opponent bleed out, making the bleed more lethal as blood stacks are added on. (same passive) If Darius kills a target with hemmorhage, he gains a powerful blood stack, allowing him to have 1 extra blood stack on a target. This does not add to the damage of Noxian Guillotuine. (Up to a cap of 7)
Darius's Decimate Darius spins his axe in a circle, with a .5 cast time. Darius can use abilities during the cast time, and will gain a X amount of speed. Damage is highered for base damage, lowered for AD scaling.
Darius's Crippling Strike Darius will cripple his target, a destructive three seconds of slow, and the slow begins extremely strong, and becomes weaker.
Darius's E , Apprehend. Darius pulls his target in, peeling skin and blood out of his target, putting a blood stack, and reducing the cooldown of his abiltiies by X seconds.
Darius's R, Noxian Guillotine Darius will jump, and deal a powerful slam onto his target with his axe, putting 5 blood stacks on the target, and dealing (same amount of scaling). If Darius kills a target with Noxian Guillotine, his teammates nearby gain a shield for three seconds, for half of the damage Darius did with Noxian Guilotine. If Darius kills a target with Noxian Guilotine, he can recast in 20 seconds, and at level 3, he can recast it completely. Noxian Guilotine has no mana cost at level 3.
So, what does this do? This makes Darius STRONG, he's still a brute, but now, he is a powerful teamfight fighter, can animation cancel, sort of, and, still deals damage, and is counterable with the cast time. His abilities still have the simplicity before, but with some twist for people to make plays with.
and the new Sterak's Gage. If you don't love it then, I don't know what to tell you.