I don't think he needs one for Khabib beating a guy that Conor has beaten at the guys natural weight class (Though of course a lot younger). Max hasn't fought at LW since he was a kid fighting in Hawaii, while Khabib struggles cutting to LW. Nothing really proven by a dominant Khabib here, would even have preferred to see Eddie Alvarez step up, though he probably can't make weight this short notice.
If I am Max, would definitely refuse to fight if Khabib misses weight.