It's safe to assume all face models are just used for a base, and then on top of that NRS puts the traits that reinforce visually their concepts. Sindel had to be aged up, and her face was clearly remodeled a bit to ressemble Kitana.
Another example would be Johnny, his model looks handsome af, but Johnny looks trashy because his core concept is about looking goofy.
All models are just a base layer, and on top of it the characters come to life.