I remain amazed that many people insist that T'Kuvma and company are irreconcilably different from the TNG era portrayals. These are big, carnivorous-looking aliens with prominent forehead ridges and significant individual variation in appearance. They're different in some small details, like the extra nostrils, but outside of the most extreme visually literalist stance, is it really that hard to square these guys against Chang, Martok, and Worf? Replace the shine and detail with a classic rubber mask, silicon makeup, and matte brown body paint in exactly the same head and body shape, stick them at a side table in Quarks circa S6 of DS9, and I challenge you to notice anything amiss.

What this rework did do was make them feel so much more alien, and so much more dangerous. They outright eat people, which was occasionally hinted at but is noted far more literally in Discovery, and very, very easy to believe looking at these guys. I wish they hadn't backpedalled so hard with a return to the 1980s makeup in SNW 2x01, because I would have loved to see these monsters chumming it up with Spock: that scene would immediately have been slightly more unsettling, bringing the audience closer to what Spock and his crew are likely feeling about their momentary drinking buddies, instead of the much more casual feel we got from Klingons who look just like our old friends from DS9. These guys are still dangerous aliens whose friendliness is tenuous and temporary; they would literally eat Spock if circumstances were slightly different. We shouldn't forget that.

I don't mind that they tried. And tried to link them with TOS and later Klingons. I just thought the makeup was too heavy. You never really got any memorable Klingon character faces. And I'm just taking about their faces. I enjoyed their costumes and ships.

The Bird of Prey design looks... imposing. The Armor, despite being very impractical, looks good. The Alien Race is well-designed, but it's not what I would think Klingon would be. But yeah I kind of like how they're portrayed, as a serious threat instead of some goofy alcohol-addicted space Vikings with a kind-of interesting way of life.

I dug 'em. It was a good experiment in pushing Trek's aliens beyond a forehead and an accent.

I rather liked it, and the more alien take on them, but I can also see why people didn't.

Part of the issue is probably that Discovery changed them too much. Previous alterations to the Klingons tended to be one thing at a time, except for the TOS films, but even they kept some things the same, like their technology.

Discovery went with a bit more of a complete overhaul, with massive changes to the language (following the pronunciation guide more closely), and alterations for both their technology, and the Klingons themselves, which might have been a bit jarring for most, especially when people were expecting more of a settled look for the TNG/TMP Klingons.

You do have the visual changes for the Klingon Empire in the Kelvin films, but that gets excused as it being part of another timeline, hence all the differences.

Things like the Klingon cleave ship, and the T'Kuvma are massive changes from what people are used to when it comes to Klingons. Klingon technology previously tended to be birds of prey that cloaked and shot energy bullets/torpedoes, not cloaked ship-breakers that used ramming speed as their main vector of attack, and Klingon supremacists didn't really exist like that. The closest we had to something like that was Worf, who was much closer to a Klingon purist/fanatic than a supremacist.

Although I personally feel that there was a missed opportunity not interspersing things with the various other Klingon designs of the time. Having a supremacist faction within the Klingon Empire, with massive visual changes (maybe due to overcompensating for Enterprise's Augment Virus?), could have been an interesting way to add depth to the Klingons, and the Empire.

Especially if that diversity of thinking between the Houses is/was one of the strengths of the Empire. Each House was more like a separate power, and they simply collaborated under the banner of the Empire.

I thoroughly enjoy most everything about DSC Klingons. With their appearance, I didn't like or dislike their look when I first saw it so much as I was surprised. Klingons have a history of looking very different throughout Star Trek. I've rewatched DSC so many times, I'm used to how the Klingons look. However, I absolutely love the depiction of Klingon society. I still marvel at the Klingon armor and sets. The dichotomy of such a combative society and the intricate beauty of their ships, armor, everything. Their artistry goes beyond simple functionality. I think it adds depth to the Klingons.

Did it look cool? Yeah it looked awesome. But was it ever going to be sustainable, budget-wise?

The only huge issue I had with them was their makeup was so thick the actors clearly struggled to act through it. Contrast to such expressive Klingons such as Kor, Gowron and Martok which was very difficult to do when you can barely move your face.

If that hadn't hamstrung the actors so much, I think they would have been more enjoyable than people found them.

They would have been fine with hair. The whole thing where everyone is bald was the point that made it look bad.

I have pictures of T'kuvma photoshopped with hair and he looks great.

Another thing I want to mention is that Gene himself never held the series up to visual continuity. When the budget got better, the sets got better and so did the makeup. It was just a natural progression of the series. I don't feel like it's a stretch to keep trying to improve on alien appearances, especially as the aesthetic for the show changes and evolves. I like the SNW bridge update. I like that it's all metal and glass and feels substantial.

I thought it was all a bit confusing - it was introduced with no explanation, which felt like it was setting up some big reveal that never came.

I like the, as you say, Giger-esque design but felt it was such a departure that they may as well have introduced a new species.