I agree with the viewpoint of your last post Malaika, I like how you tie the change of importance between Uhura and McCoy as a sign of the times. That seems to be why these changes occur over time, in order to keep the character interactions and situation current.
I have another analogy and prediction that is completely separate from your post, but will post it here to tie into the whole Uhura McCoy interaction you suggested.
They just need to give some interactions to Uhura and McCoy too . . .
Here's my next prediction, that Uhura and McCoy will hook up in the next incarnation of ST. Here's the reasoning behind my theory:
Ok, take Goldilocks and the three bears:
Kirk= Papa Bear
Spock= Mama Bear
McCoy= Baby Bear
Uhura= Goldilocks (or rather, the antithesis of Goldilocks)
First Goldilocks gets into Papa Bear's bed, but it's too hard and she doesn't like it. In the original series Uhura and Kirk have a kissing scene in Plato's Stepchildren (the fact they were forced into it doesn't matter in this analogy). Obviously Uhura must have though Kirk was "too hard" and didn't like it, since nothing more came of it. (I've read a pretty good case for Kirk and Uhura having something going on the side in the original series, which can be inferred by his preferential treatment of her on the bridge, but that's another story.)
Next Goldilocks gets into Mama Bear's bed, but it's too soft and she doesn't like it either. In the reboot Uhura has several kissing scenes with Spock, but my guess is eventually she's going to decide this rebooted Spock is too soft and she won't like it, and she will eventually dump him. Or maybe she won't dump him in this reboot, and maybe they will begin the next reboot together but she will get bored with having to wait seven year to have sex with him and will dump him for being "too soft" for too long of a period, which leaves the door wide open for McCoy to step in.
Finally Goldilocks gets into Baby Bear's bed, and it's just right! Based on this motif, I'm going to predict in the next reboot Uhura is going to have even more kissing scenes with McCoy, and she is going to like it and stay with him.
To further my theory, remember what Dax said of McCoy, he's definitely got surgeon's hands.
Maybe through some weird transporter accident two of them will eventually be merged into one character, like Tuvix in Voyager. You know how much McCoy always hated the transporter, and maybe for good reason after all. Any thoughts on this?