The Vic Fontaine thing was pretty dumb, I agree. Especially given that it accomplished nothing whatsoever.
But, I like them explaining Klingon diversity. And, the difference in Discovery was fine. There can easily be different varieties of Klingon, just as humans come in all varieties. The Discovery ones simply have darker complexion (like some humans) and shave their heads for cultural reasons. The TNG-VOY ones are the most common ethnicity. And, the TOS ones are affected by the augment virus. Since I don't like reboots, I like the way Trek endeavors to connect everything, even if judicious use of parallel universes is involved. Others are free to disagree.