For me, Robin Curtis was the better Saavik, except for her hair. She was more Vulcan-like. Alley may have looked better to some (then), but I always preferred Robin Curtis, and I think she DEFINITELY has held up better over the years than Alley. Not to mention, Alley's Saavik was way too human acting for me.
But I am glad Saavik wasn't a traitor.