Or a non-Constitution like the Reliant?
Oh! Oh! USS Pioneer NCC-1500! its the TOS era STO easter egg also tucked away in the PIC's starfleet museum. I just really like the sort of side kick hero ship vibes the class has compared to other alternate-TOS era designs I've seen.
While I welcome the more flexible interpretation of TOS visuals to make a world that is more immersive and functional while still keeping the color, and perceived campiness, I'd draw a hard line against making a genuine "Re-TOS" as it were. The idea of overwriting, or demoting old performances strikes me as a path to perpetual reboots and origin story retellings like we see with comic book superhero's, and seems a tad rude to trek's own past and how it got here.
Its also pretty unnecessary, folks often talk about how they want to see the old stories updated for a modern audience, but its often the case that the same stories have been retold with different characters and places already throughout trek's subsequent series, and as a result we are flush with ways to retell TOS's hit scenarios without crossing that line. Naked Time(TOS) vs Naked Now(TNG) vs Singularity(ENT) would be a commonly cited example, and we even already saw SNW demonstrate one such way to go about this with "a quality of mercy" a time traveling what-if reimagining of "balance of terror" had pike been captain and not kirk.
I accept and expect paramount to still be making at least one show set in the 23rd century for as long as SNW and its successors do well, but these should be used to look forward and expand on the time period not backwards at where we've already gone before.
C'mon mate that's quitter talk, making the mess make sense is half the fun of startrek continuity. Plus as time has gone on and the teams involved have gained hands on experience making trek the contributions have progressively gotten more constructive with the continuity rather than combative.
ENT era.
Externally speaking Starfleet ships march to the beats of NACA/NASA X-planes, Klingon embrace a very soviet yet alien look in contrast, Vulcans look advanced and sleek yet ancient and mythical with the biggest pointiest toys on the block.
Internally speaking construction is depicted as having limits, tech and interfaces are familiar to real world, cramped ship like rooms are the norm, and there's no handwaving over how everything might fit inside the ships.
The automated repair station from ENT's Dead Stop (AKA The Ware) The novels presented an interesting idea of these rogue clumps of machine learning forming symbiotic relationships with sentient life that have the developed grey matter the Ware needs, but are filtered from becoming advanced, tool using, space fairing civilizations due to essentially lack the physiology like the opposable thumbs common to progenitor seeded humanoid races.
Xindi showed up in the later half of PRO. They ran security at a seedy trade hub the kids were trying to hitch hike from. The thing was though that these were Xindi Reptilians and this was a snowy Ice world... Kinda a problem when ENT dedicated screen time to saying Reptilians were cold blooded (though to be fair Reptilian's did have an inclination to bio-engineering they could have just made themselves warm blooded).
Technically that's already been done with TAS... Would a TAS remaster similar to TOS-R be out of the question? basically keep the voice acting (and other sfx since I expect it can't be isolated) but reanimate it from the ground up?