Exactly. It had everything to do with saving money, not honoring anything. DS9 was a gimmick episode, honoring an anniversary. They did not speak of it ever again.
Absolutely correct.
Now sure They're were a few episodes that did try and recreate the original look. But those were designed for singular episodes.
If when TNG ended they decide that they were instead going to do a Discovery style show there is literally no chance they wouldn't have updated the visual look.
This is especially true the further you get away from your original source material. Hell TNG didn't even do a slavish recreation of Encounter at Farpoint for All Good Things. They dd some nods, but thats about it.
Those were stunt episodes and there was still quite a few living TOS fans during that time. I was just very young kid when TOS came out and I am 60 now. Since the average age of the TOS audience member was over 35, that means by the time Streaming Trek came out a good chunk of that audience have died.
And just to be absolutely clear for those that think SNW does a solid job of honoring TOS but still updating it, you seem to forget that color scheme, that design look isn't appropriate for the time SNW is set. It should be grabbed, and highly muted styles.
It's matching an inappropriate look that is not based on the period it is in. Its using post Pilot episode of TOS, not the material from the Menagerie as a starting off point.
And I am quite sure the majority of the general audience is very happy with that choice, even if it is utterly wrong.