For me, having them look like TNG Klingons doesn’t even solve the problem because ENT had implied that shouldn’t happen until the TOS movie era. They could have rendered explicit the implication that not every Klingon was infected by the virus, but that still doesn’t support making the Klingons look how they did in s1 DIS.
Folks forget the klingon’s made that Augment virus which then got loose in a lab breach. If they could do that to themselves on accident imagine what they’d do to themselves on purpose to try and compensate as the implications of the augment virus turn thier society upside down. There’s much I don’t like about Disco Klingons but the face redesign intrigued me as a potential reaction and over correction to the augment arc in ENT, and how past exchanges like that ultimately lead to federation vs klingon hostilities. Unfortunately Disco didn’t capitalize on this probably cause if they start explaining things they’d ultimately have to admit they can’t get away with haveing the longest heroship in canon…