One thing I never understood - I know Saavik was originally meant to be half-Romulan, half-Vulcan, and that's the way Kirstie Alley portrayed her, even though this was never explicitly stated in the films.

Then why doesn't she have the pointed eyebrows (something Robin Curtis did have in III and IV)? Romulans and Vulcans both have pointed ears and eyebrows, but Alley's Saavik only had the ears. It would make more sense for Spock to have human eyebrows and pointed ears since he's half-human. (Though I'm glad he doesn't.)