Disappointing opponent choice for Kovalev, but happy he's returning soon, and even happier we get Bivol-Barrera. Barrera gets the title shot he deserves, and we get to see how good Bivol is, against by far his best opponent.
Mikhalkin is a decent fighter, he's actually better than Shabranskyy. But most people have never heard of him so the HBO ratings may not be so good.