But this goes back to my problem with using the Gorn in season 1. If you don't want to be consistent, there's no reason you had to use these characters and story elements.I honestly don't give one whit whether the characterization of any of the folks we see in TOS are consistent with that portrayal. The series is now close to 60 years old; I expect a more modern spin on the characters. I do want the characters to be consistent within the show though, which is why this episode was in part a failure for me. The whole M'Benga/Chapel fight sequence with the Klingons was not only nonsensical, it was in no way rooted in what has been established regarding their characters.
Create new ones! They've already created a Khan descendant for this. Why would it be so hard to give M'Benga a nurse we've never heard about?
There's no reason this had to be Chapel. It could have been some other nurse that you give these attributes to and establish a relationship with Spock pre-TOS, just like you could have created a new alien species to be Xenomorph/Predator lizard hybrids instead of putting all that stuff on the Gorn.