Let me see if I understand this correctly-from TOS to TMP is completely understandable because of technical and budgetary reasons, but a 2017 flagship show to increase CBS' streaming service doesn't mandate any changes?I think if Kruge and Maltz went to Quarks and bellied up to the bar next to Martok and Worf and ordered some blood wine, no one would bat an eye. They would fit right in, easily recognizable as Klingons. As would the TMP and TUC Klingons. I agree that they should have established that among Klingons there are many ethnicities and "races" that show a range of phenotypical attributes, from skin tone, ridge height, and many other features. But one can reasonably assume that. The same goes for the Andorians.
The TOS-TMP change is the only really dramatic change for the Klingons. That was for understandable technical and budgetary reasons relating to a 1960s tv show vs a late 70s major motion picture. That doesn't apply to the Discoverse. This is just them saying they think it would be interesting and fun to reimagine the aliens. How many of them I don't know. We'll see. I love reimaginations and reboots. Viva Reboot! But we already know from their own mouths that they wanted to break from "fetishes" about how the various aliens look and reimagine them.
Great! But that's a reboot/3rd timeline for me. As for the Klingons, ENT decided (unnecessarily IMO) to explain the difference in story. Having done that, Discoverse should follow that, unless it's a 3rd timeline, in which case, it doesn't matter one way or the other. It's not a "fetish" though.
I'm always amused that TMP's changes necessitated no explanation to the audience. They simply were Klingons.
We simply don't know enough about Discoverse Klingons to know the full story.