Newer princesses looks more modern, smart and liberated. But they send the same message that older princesses (get saved by males) did, which is even worse because no modern girl will identify herself with Snow White but they can with Jasmin.
Here is where the value of Pixar comes in, with new (and way better) stories, new characters better storytelling (less songs) and new technologies this generation will be growing much more liberated and become free thinkers.