Yes, the smooth-forehead vs. bumpy-forehead thing was addressed in a couple of episodes of Enterprise - the Empire used genetically-enhanced human embryos to try to create Klingons with Khan-like characteristics to use against the Federation. The virus they used to make the mods... started killing them. They were able to stop it, but when stopped early, the physical and neural changes resulted in the creation of the smooth-forehead, more-cunning/less-honorable TOS Klingons. So the bumpy-forehead versions are the original genotype. And those changes could, eventually, be at least cosmetically altered - remember that Kang, Kor, and Koloth (from TOS) all appeared, played by the original actors, as bumpy-forehead Klingons in DS9's 'Blood Oath'.
I did not like the JJverse Klingons. Why would the appearance of the Nerada in the timeline 20 years before TOS change the Klingon genome? Are they, perhaps, Romulan-fusion Klingons? Did the Empire not learn its lesson with the Klingon Augment Virus (that created the TOS Klingons) that nearly killed the Klingons? What's up with that?
Now we have the Klingorcs, and no basis for those MAJOR changes to everything we've ever seen in ANY Trek prior to now. On top of the poor application of makeup and the false tiger-shark teeth (part of what we've never seen in any Klingon prior to now) they have to wear so that they sound like they're talking around a mouthful of rocks.
If this had been set in the JJverse, or even in Prime but 150-200 years after Picard, with the Empire having split from the Federation after a poor Fed response to a major disaster in the Empire that ended up resulting in the changes to the Klingorcs that we saw? I'd have FAR fewer issues over the changes to continuity. The more-advanced tech shown would fit right in to either situation, as well. The story, as shown in the first half (on-air portion) of the pilot, would have worked almost as-is - couldn't use Sarek, obviously, but that was a poor choice anyways. Burnham didn't need a connection to Spock's family that was never even mentioned in FIFTY YEARS of Trek.