Look, this is nothing that Trek fans haven't been dealing with for nearly 40 years now. When TMP gave us bumpy-headed Klingons, Roddenberry himself wanted us to believe that Klingons had always been bumpy-headed, but fans still came up with theories to reconcile the smooth and bumpy versions, and eventually one of those theories made it into canon. Trek fandom has decades of experience reconciling seemingly inconsistent visuals, so one new detail certainly does not require throwing out everything else.