Now let’s look at what we learned about the Klingons in DSC through their four characters:
They are xenophobic except when they’re not (cf all the aliens on their home planet)
You forget to mention all the 'aliens' are in a ghetto area specifically set aside for them away from the rest of the planet.
They’re cannibals when the story wants to gross us out.
How many times on DS9 did Worf or Martok talk about "feasting on the enemy's "still beating heart" during or after combat?
They have terrible dress sense in the 23rd century.
Um, they look terrible no matter what century they're in.

Plus the 'Klingon Look' changed from original TOS feature film to feature film and said look even evolved overall throughout the 18 years (24 TV seasons) of Berman/TNG Era Trek.
They struggle to speak their own language.
Hey, blame that on the Federation UT - which supposedly in TNG Era Trek is 'always on' and a function of the communicator pins - yet every so often it decides to NOT translate Klingon and let the 'real' Klingon word be heard instead.
My understanding of Klingon culture has never been so rich.
That's because it's never been consistant:
TOS era - They're effectively nomadic Mongol type warriors (Victory and success prized over any 'Honor')
TOS Film Era - They're buffoons (In STIII:TSFS the boarding party doesn't even realize they're listing to a countdown; and Kurg kills his wife/mistress for effectively verifying the data she retrieved is legitimate, etc.) In STVI:TUC The Chancellor has ZERO clue his entire Military Leadership is conspiring against him.
TNG Era - They start out as very similar to TOS Film era Klingons and we hear occasional talk of "Honor" (uyet is TNG S! "Heart of Glory" we have two Klingons ready to take a child as a hostage (If Worf wasn't there and they didn't still think they could win him to their cause - they would have used the child). And don't get me started on the idiotic Klingon Bird of Prey Captain in TNG S2 - "A Matter of Honor" who feels is perfectly okay to kill himself and his entire ship crew (not to mention perhaps start a war with the Federation) all because he somehow stupidly feels the Federation is out to sabotage/destroy his ship for no real reason. By Season 3 of TNG the writers started to show Klingons in general as more intelligent/politically minded; and seemed to model their society more along ancient Viking Culture - and 'Honor' was just a political tool to many of them.
The setup in ST: D is akin to how TOS introduced the Romulans in TOS - "Balance of Terror" - IE Klingons had retreated and come out for the occasional raid, but after the 22nd century 'Archer' Star Trek had really maintained contact with Humans/The Federation for nearly a century - until the T'Kuvma incident.
What we learned about Klingons is they're divided. they control a vast area of space; but it's all independent Houses who fight among themselves, and their is no one Chancellor or Klingon Council Leader uniting them. Klingons have supposedly attempted to take control over the past century, but none have succeeded. (IE - Very much like the Mongol tribes prior to Genghis Khan.)
While the recurring Klingon characters were basically (as I said in another thread) Worf's family, houses feuding with Worf, and Martok, there were plenty of one-off Klingons who actually had names and even personalities in TNG and DS9.
Regardless, it was more excusable for most of the run, because the "Klingon arc" mostly dealt with the issue of redemption for House of Mogh. Of course with a smaller-bore story like that you're going to see a story which focuses on only a few characters. It only jumped the shark right at the end of the series, where a knife-fight between Gowron and Worf settled the leadership of the entire friggin Klingon Empire.
Still, I wouldn't argue that TNG/DS9 is the standard to hold to here. TV has moved past that. As I said in the past, Game of Thrones is an interesting comparison to DIS because the first season had roughly the same budget and runtime, and was also released on a week-to-week basis. They had 18 main cast members, and gave decent development to maybe another dozen recurring characters. How come GoT could do this for 30 characters in 10 episodes, but DIS couldn't even really flesh out a dozen in 15?
True, but with only one Season (15 episodes) of ST: D - The Klingon story seems VERY centered around L'Rell and Voq/Ash, and it will be about how she either succeeds or fails to unify the Klingon Empire and the fallout from that.
ETA: I got confused between T'Kuvma and Voq, my bad.
