Just a hunch... I mean who would fight Rakhmonov unless the fighter either wants to die or he just doesn't care anymore.
Guys like Stephen Thompson obviously

, he knew his retirement day is fast approaching and, if that's true that he was still hoping for the title, that would be a fast track to the title fight.
Some other guys might as well. I don't think Gilbert Burns would refuse to fight Shavkat if the money was right. He has to defeat someone ranked higher than him to get a chance of fighting for the belt and losing to Rakhmonov won't bring him any shame.
Usman might as well. He seems to believe in getting back to the top, so he needs to prove he's the best by not shying away from the challenge.
Belal Vs Edwards and Rakhmonov Vs either Usman or Burns is what we're most likely to see.
Couple that with Covington's poor showing vs Edwards, I think he doesn't care much about fighting in the cage anymore.
You're writing him off too early. He had a poor performance, but it was against the champion. He's definitely not yet in "I don't give a f**k" stage of his career.