Am I the only one who really liked Robin Curtis as Saavik? She was really good as a Vulcan.
I only learned the part-Romulan backstory much later, never cared for it, and it's not canon anyway.
And yes, it would've been much better if Saavik would have been the traitor. But it should have been Curtis' Saavik, as that was the version of Saavik that was present when David was killed by Klingons, and that's the connection which would've made it aweseme.