Excuse me... but are you sure, the all the novel's writers has agreed about this? About Nimoy's Spock, Nero and Narada are from the Original Timeline?
As Dayton says, it's not up to us. Our job is to follow the lead of the people who actually own
Star Trek. We're just guests in their backyard.
here are some tricky facts that seems to me do not fit:
1. A Supernova that can reach the planet within minutes without the warp-capable civilization able to evacaute most of its people..... this if we presume that the supernova was original from Romulus System. If we assumed that the Supernova originaly from the Hobus... it become more trickier.. since this nova has "advance warp-drive" capability moving from one sytem to another in a count of weeks...
The Undiscovered Country showed the Praxis shock wave reaching the
Excelsior parsecs away within minutes.
Generations showed Soran's supernovae having instantaneous gravitational effects on the Nexus and distant starships, again over parsecs. ENT: "The Catwalk" showed a "neutronic storm" travelling faster than light. There's plenty of precedent in the Trek universe for FTL cosmic phenomena.
Besides, alternate timelines would have the same physical laws. They're alternate quantum states branching off from the same original universe, a universe whose laws were set down at the moment of its creation. After all, if two universes had different laws of physics, there's no way they'd evolve the same stars, the same planets, the same species, and the same individuals. Any universe with a planet Earth and a human species is going to be a temporal subset of our universe, one that diverged from the rest quite recently in cosmic terms. So every timeline we see in Trek must have the same physical laws; only the history is different.
2. Where in the hell Original Scotty, making transport from a planet in to "warp-driving" ship which left the planet hours ago (if we asumed it's all happened in a daylight)? If so, why don't Scotty transport himself to another ship rather than buffer-looping his matrix when he was trap in dyson sphere?
All we know is that Scott Prime developed transwarp beaming sometime before Spock Prime left his timeline in 2387. Scotty could've developed it after his rescue in 2369.
3. The Romulan we all know, using a Photon or Quantum Thorpedo equal rather than.... what should we name it.... Ion Propeled Missile? or Kriptonide Power Missile.
I don't understand what you're arguing here, but Nero's ship comes from 2387, and the last time we saw the Romulans in the Prime universe was 2379. They could easily have developed new weapons in that time.
4. I believe that Romulan has better understanding and extremely more advance knowledge about creating a Singularity, since their flagship are powered by artificial Singularity... so it would be odd, the Vulcan mastered the Red Matter first.
The singularities seen in the movie were of a very unusual type.
Besides, you can find equal or greater discontinuities between any two Trek series or films, or even within a single Trek series.
Insurrection had Deanna claim she'd never kissed a bearded Riker even though she did so several times on camera in TNG. In TNG itself, Data routinely used contractions until it was suddenly asserted out of the blue that he never did, and he expressed signs of emotion for two years before he was retconned into an emotionless being. Khan's followers lost their ethnic diversity and got younger in the 15 years between "Space Seed" and TWOK. Trek continuity has never, ever been seamless, and yet we pretend that it's all a single reality because that's how fiction works: you pretend, you suspend disbelief, and you don't obsess over the inevitable glitches and inconsistencies that any long-running franchise created by multiple hands is bound to have. It's the prerogative of the creators of a fictional world to reinterpret and refine it as they go. And the reinterpretations and inconsistencies introduced in this movie are no greater than those found in previous Trek episodes and movies over the decades.