I've just skimmed through this thread and find it kinda odd tbh.
Why does Saavik look different in Treks II & III?
Is she a Changeling? Did she go through some sort of Delenn-in-Babylon 5-style-metamorphosis? Did she have plastic surgery? Did she undergo extensive facial reconstruction for the sake of some secret Section 31 style mission, and then they messed it up and couldn't get her back to the way she was? Or did she always look like that and the one we say in II was the 'changed appearance??
... did they just use a different actress?
And as it's only a movie/TV show you have to just shrug it off and go "oh well, ok then" and that's it?