So apparently Number One's backstory was actually taken almost wholesale from DC Fontana's "Vulcan's Glory" novel. And I checked the episode's credits... Dorothy was not credited at all.
Also, on the issue of genetic modification, didn't Chapel use that in the first episode to disguise the landing party? So its allowed in certain instances?
I've been reading Vulcan's Glory and there's more the SNW team might have lifted from it. The novel (which is quite good, by the way) depicts Spock's first mission on the Enterprise under Pike's command. Besides Number One's backstory, it also includes Spock meeting with T'pring on Vulcan (she's scheming and manipulative, and I wonder if this subplot will be borrowed wholesale) and a Pike who considers his crew like family and is much warmer than we see in "The Cage."
I'm only halfway through, but I can recommend Vulcan's Glory unreservedly as an antidote to modern Trek. Fontana had a firm grasp on the material, for obvious reasons, and the characters behave and speak like real crew on a real ship. Such a breath of fresh air.