slash romance between leads that don't really need to be hooked up (Spock/Uhura)
Look, if Scotty didn't mind his ex-girlfriend hooking up with Spock, then -- . Oh, wait. Other universe. And at a later time. My bad.
In some ways, Uhura could take on the role Amanda had in TOS and the movies, she can gently but firmly remind Spock that he is half human, he has feelings he can and should deal with, and the human half of him is as valid and important to who he is as his Vulcan half. It won't go away if he ignores it, and his feelings can't be denied and therefore made irrelevant. He must live with it and make it useful. I think having heard it being called a "handicap" by the head of the Vulcan Academy would probably accelerate him in that direction, too. To deny his human half's positive capabilities or say realizing them makes him a less capable person would be essentially admitting it is a handicap. This Spock has realized far sooner than Spock Prime did that his human half may be a unique gift, and Uhura is there as a reminder of that.