Just because Quillin is Black doesn't mean he's slick. PQ is as slick as sandpaper. Murray and Macklin are both living off their close fights with Sturm but neither has actually beat another contender. Macklin, Barker, Murray, Lee should have a domestic showdown to get a bit more experience against another good MW and built themselves back up into a legit contender.
Doubt it, Golovkin is hype until proven otherwise. Mack "The Knife" already proved himself against top op.