I've always maintained that the ships used by the Klingons in DSC S1 were superbly done. They just didn't at all seem to be suitable as "Klingon" ships (especially the one that showed up that everyone called a "D7" that
clearly was not).
Would they have worked for any other lesser-known species? Absolutely, without a doubt! Klingons? Absolutely not. The wonky Gorn ship used in SNW doesn't invoke the same visceral disdain as does the DSC Klingon ships to me. That's mostly because we never knew much about the Gorn and they were a pretty much blank slate, so have at it!
And if they'd given the Fed ships the single simple adjustment of round(er) nacelles, I think it would have been a considerably much easier pill to swallow.
Fuller's "change for the sake of change" approach, reversing the "25% different" rule and making it "75% different" was, as
@cooleddie74 said, misguided - woefully so. And I think that's putting it
very nicely. Oh, well... Much water under the scattered ashes of many fandom bridges demolished with thermite.