I have more of a problem with Kahn looking kinda lanky then him being pale. I mean new khan didn't have the luxury of owning fantasy island .
As for the emotions, it can also be explained by the losing of his planet. In this timeline spock never did what Nimoy's Spock did. Remember, Spock rejoins Star Fleet in the beginning of Star Trek 1 after studying more on Vulcan.
Of course, it could all be bull****, and I am reading into things that aren't there...