Both joints are super hard.I think you're mistaking New Slaves and Black Skinhead. I'm not even into this song, thought it was the worst song on the album. And it is sampled off a traditional rock poppy ballad so it makes sense. Adding Miley is just as subversive as the title of the song, I guess. Kind of like rapping about bytches over that Strange Fruit sample. Also, Yeezus is a flop by Kanye's standard, adding Miley will definitely give it a slight boost.
Stop all that c00n shyt
Early morning cartoon shyt
This is that goon shyt
fukk up your whole afternoon shyt
I'm aware I'm a wolf
Soon as the moon hit
I'm aware I'm a king
Back out the tomb bytch
Black out the room, bytch
Stop all that c00n shyt
These nikkas ain't doing shyt
Them nikkas ain't doing shyt
Come on homie what happened
You nikkas ain't breathing you gasping
These nikkas ain't ready for action
Ready-ready for action
Are you kidding me

And it's not sampling anyone, specially not no damn poppy ballad (It's however co-produced by No ID, Lupe Fiasco, Mike Dean & Daft Punk), if anything it would've been death metal or something.
The only thing Miley Cyrus fans would understand about this song is that he said 300 romans and not Spartans.
And yes Yeezus was a flop, dude did no interviews, no singles, no radio, no promo except some projectors streaming a video of his big ass head rapping rapping New Slaves. The album is completely different shyt, super hard, the songs are made to break all types of popular music structures there are as far as hooks/bars, drums etc goes.. He's got enough money, acclaim and success to not give a fukk about record sales. Just observe the lyrics to his latest single and ask yourself if these are the lyrics of a nikka who gives a fukk about sales.