Got back from the theaters seeing this. Man, this movie just works!
It seems to be yet another cut of the movie, it largely contains everything from the DVD/earlier anniversary cut but one exchange is removed. When Kirk and co. arrive back on the Enterprise from the Genesis cave we see them climbing through the Jefferies Tubes and Kirk says, "That young man back there is my son." Spock, "Fascinating." (Almost in a tone as if to say, "But of course he is, you slut.")
I guess I can see why it was removed, it's overall an odd thing for Spock to say in the circumstances and maybe out of character for him depending on how you want to interpret his response and, narratively it's unneeded as it's information the audience already has.