These are getting way too long. And so much seems to hinge on a misunderstanding or something I'm asking for and you're not giving me or just two different "facts" we haven't agreed upon yet or won't. But I won't take them point-by-point. Let me explain. No, there is too much. Let me sum up.
I can't get past your certainty the Romulans called themselves Romulans or Rumalins 2k years ago. I don't see evidence for that. They WERE Vulcans then. Most of your assertions seem to hinge on that belief they had their own racial name despite identical appearance.
I won't equate Spock's lying in the
Menagerie to lying about knowing the Romulans were an offshoot. One is disloyal to the captain, the other is loyalty to captain, former and present, in helping one and shielding the other by taking all the blame and even risking his own life. Kirk could easily forgive one, but not the other. And secrets come out, if not right then, then later in hundreds of different ways.
Though Spock knows of racism, even of a bridge officer who is guilty of this, the vast majority of Earthers seem to have gotten over that small minded pettiness and unimportant difference in light of dozens of new races. You don't like the Rodenberry more Utopian Federation ideal and prefer a darker, grittier take, that's your call, but most things I saw in TOS and beyond has racism in the minority, the majority holding that minority view with disdain, so openly expressing it would likely get you canned, written up, fired, dismissed, etc. I think Spock could live with those odds and stand up for himself.
I reject the notion Vulcans must know (Romulans are an offshoot), and most everything that follows from that.
While they don't openly volunteer information about Ponn Farr, they don't hide it as if it is a state secret, either, but just a personal or embarrassing matter to nearly all of them, sharing it with some, but mostly not talking about it.
Your "fixes" to make your assertions more plausible by having most everyone lie on the official record is just not supported in most cases, even if it's one of those possibilities, and has been done before when they expressly promised to do it in dialogue, it seems an improbability in most cases. As is T'Pol deliberately screwing the UT up with Hoshi gone.
T'Pol and the UT heard what the Romulans were saying. She didn't recognize it, the UT didn't recognize it, and I have to believe if it was just old Vulcan or a dialect of that well known language, she would have, the UT would have, and later Hoshi would have recognized it for that, too. That is not the case since none of them recognized it. Thus, it's a new language, adopted or adapted or invented by the Romulans or Rumalins, almost certainly after the exodus.
True, I doubt Hoshi would mishear. So in the language they are using they are called Rumalins, and for all we know that is the correct native pronunciation in their current language. T'Pol has heard it is pronounced "Romulans," so she says this, and it's only particularly dramatic since the audience knows who the Romulans are.
Dunt dunt daaaah. That's what is stated in the Vulcan database, and it comes from rumors, hearsay, secondhand information, and common consensus "Romulan" is how most of boys on this side of the tracks are saying it. Even Archer knows that pronunciation from a future look, but that just means that is how the Feds came to produce it, regardless of how the natives pronounce it. T'Pol has heard they are aggressive and territorial. That is all she knows. Since they didn't use that language or have that name or even necessarily paint their ships like that 2k years ago, there is no reason to suspect they are anything other than another unknown species, or little known species, with which they have yet to establish formal contact. This is Vulcan's and the Earthling's first direct contact (
Minefield).
BTW, even here in
Minefield, those two war birds did not engage warp drive, as far as I know, but were hanging around there protecting their latest acquisition, that planet. Probably left there by the mother ship.
The Romulans may know who the Vulcans are, but if so, they wish to keep their secrets, so generally they don't use visual communications, Vulcan languages, and self destruct before allowing any enemy to take home proof and hard evidence, like a dead body. (Although, they did let one go drifting away as a ruse a century later, so maybe it was worth the risk since Deceus already screwed the pooch).
Later, when the Romulans are using drones, Archer fights the Romulans again, but does not see them, or learn of their Vulcan heritage. Not long after, the Humans, the Vulcans, the Andorians, and the Tellarites go to war with the Romulans for 4 years. They learn things, like they paint their ships with birds of prey, and they'd rather go boom than surrender. But they do not learn of their Vulcan heritage since they don't visually communicate, use old Vulcan languages, don't surrender, and don't allow themselves to be captured. Even the Vulcans don't get a clue these are Vulcan offshoots. Just a warlike race called Romulans or Rumalins. So now we know about the Romulans in many ways, except for that heritage thing. So far, there is still no reason to make the Vulcan connection (apart from the head guy in the old Vulcan high command, but that was kept secret).
100 years later, most any cloaking tech we've seen up to this point is easily seen by modern sensors now, and even the ship's main viewer doesn't just transmit only natural light, like a window might, but false color images of things outside normal human visual range that it detects. This is standard stuff in 2265. Spock knows of no current cloaking tech that can get around current sensor tech, since to bend all the selective signals required would cost an enormous amount of energy. God-like beings notwithstanding, he's never seen or heard of anything that can do that via known tech, so in the arms and defense race with all known species that use tech comparable to their own, it's still a pipedream. The Feds tried it but couldn't make it work. Apparently, the Romulans may have solved that problem (BoT).
Q calling them Romulans now to a Fed just means he's aware of what the Feds call them on this side of the tracks now, even if they were pre exodus, that is the best way to describe the group in a familiar term. But we're not sure when this was, and what Q knew or when he knew it is hardly relavant.
The eventual Romulans need not have roughed too much when finding a new planet(s), since they may have had replicator tech. You can build quickly with that. The thing that likely held them back was in-fighting and the struggle for control, which seems to be on-going even in Kirk's time.
I'm not even going to dignify some of your other analogies /:=|
I seriously doubt these guys have UT surgery and nobody mentions it, but maybe that's the case. I still don't see how that works so quickly, flawlessly, or easily such that a primitive native without a UT implant wouldn't notice something weird going on, like the UT user's struggle to pronounce unfamiliar words. Shibboleth. And didn't we see often enough post TOS people trying to accommodate native languages by learning it and speaking it?
Why would anyone have diesel and nuclear in a sub? But they commonly have impulse and warp drive in a starship.
You say the Klingon surprise attack in
Errand of Mercy was from a cloaked ship? No it wasn't. Automatic Deflectors snapped on, they saw a body approaching, it fired magnetic pulses, they fired phasers back (again looking like photon torpedoes). And it was after BoT anyway.
Styles speaks of bird art since that's what was famous, and not cloaking in the 4 year war, since by then Archer already clued everyone in how to beat the cloaking they had in the
Minefield and they hadn't improved on it until now, 100 years later.
No natural phenomenon travels faster than c, so magnetic storms being blamed for sweeping the Valiant light years off course is iffy. But I'm not convinced Kirk thought any human ship being there was impossible - just that finding anything that old in the huge volume of space would be nigh impossible, and yet . . .
Since you can't crack lithium but can crack with lithium (in 20th century parlance), perhaps Kirk stole components rather than products?
Well, Jimmy crack lithium and I don't care.
I revise my opinion of when to declare a ship lost since relativistic effects may still come into play. Never. It's listed as missing and it stays that way until it's found. Though you probably can legally declare somebody is dead after 7 years, so everybody on Voyager got home just under the wire.
BoT ship is not called a scout ship, but the praetor's finest and proudest flagship. Also, space vessel of some kind, IIRC.
The tactic of flying right past them would possibly leave them open to a hit with a plasma bolt they would have time to react to. Better to keep your distance and spray and pray those areas with proximity phasers where ever sensors detect accelerations.