And here is Spock . . . There is a lack of Spock/Uhura and it's not because I ship Kirk/Spock instead, but because I honestly like Uhura as a strong single woman. Seriously, watch the original Uhura, she's awesome (as long as there's no executive meddling, Undiscovered Country wasn't the best showing of her).
Logic used to be the only sure thing in his life. He was half Vulcan, half human, his place in the universe always seemed uncertain at best.
Then Nero came and destroyed Vulcan, taking away a part of his family. He felt bonds start to develop between himself and his rash reckless captain (who had managed to get closer than anyone in such a short period of time) and slowly the rest of the crew followed; he began to feel like he had. . . added to his family. (The loyalty is not something he's familiar with, the promise of going down together is so illogical . . . And yet, a part of him appreciated it.)
Intuition is not something he normally subscribes to, but the moment Scott had called, he had known something had happened, something potentially irrepairable.
He's not sure why Jim's death affected him so deeply, and then he realizes that once again, he had a vital member of his family in danger just out of his reach, and he could do nothing to save them.
Logically, he knows (knew) nothing could have been done, opening the door to pull Jim out would have put others at risk, but (as with his mother's death) his mind refuses to stop running different calculations and possibilities.
At great cost. The words his alternate used, and he feels as if the other had understated.
To think that Jim's life was greater than anyone else's was a logical fallacy, and yet, Spock had been enraged to the point his control shattered, and he had gone after Khan with the intent to kill.
Uhura's appearance on the barge put her in danger, and the few thoughts he does have runs the line of 'Another family member in danger, take out threat'. And he does, brutally, some effciency lost.
And then, hope, Uhura shouting that Khan was nessecary to save Kirk, to bring Jim back . . .
He's still not sure what to make of the way his control slipped. The way his world narrowed to Jim is dead, Khan must pay it frightens him even now, so similar to the rage that he had felt towards Nero after the loss of his mother.
But he does understand that logically, taking out a threat to one's family is the most logical course of action. Doing everything possible to keep family with you is also logical, which is probably why he finds he has no objection to the (slightly illegal, but as a vulcan, he is aware of technicalities and will protect the doctor from any fallout) use of Khan's blood to bring back Jim. The moment when Jim's heart starts to beat, faint, slow, and almost imperceptible, is the moment he begins to gain back his badly shaken control.
He has a crew and a ship to get in order, so that their captain can once more take the chair.
. . . Spock is difficult to write, especially after a year not writing him . . . McCoy is going to be next, I think.