Yeah, Doreen Jacobi is a pretty inspired pick for Kirk, I have to say. Sienna Miller
was going to be my first choice, now I'm not so sure.
Love Suzie Plakson too, I was always surprised they never gave her a regular gig on TNG back in the day (though maybe she didn't want one). My pick for Girl-Spock would be Antje Traue
(Faora from Man of Steel).
Gender-flipping Bones is a bigger challenge. Have to think about that one. (I look forward to being able to watch that "Girls on Film" short.)