So, with Darius being in a pretty awful spot right now I'm suggesting ONE change to him
Juggernauts are tanky fighters with insane damage and tools to survive in the midst of battle through forms of sustain, relying mostly on two stats: Total AD and HP
Both of which you find in plentiful amounts when looking at Juggernaut itemization

Yet unlike some Juggernauts who benefit extremely well from total ad, especially champions like Mordekaiser and Illaoi with insanely high base AD values and a lot of spells that scale with total ad (heck, Morde's q in itself has a 370% total ad ratio) Darius only really benefits from it on Q and W, and even then the ratios and frequency he can apply that damage isn't anything to write home about.
The removal of Fervor of battle hit him hard, especially since his Ultimate, Noxian Guillotine, scales solely off BONUS AD, making him unable to increase his damage with Sterak's gage.
So, with fervor gone, I suggest one change: >Make Darius' R scale off total AD
it'd be a neat little buff to make Sterak's more desirable on him and give him some of the damage back he lost.
and
are force to buy WAY more damage than
to be effective, if your change went through he would forever need to be balanced around full-tank builds.