That's a nice article, but it leaves out about four out of seven chapters of the original story... the whole middle. As written it is an epic journey, with so many interesting characters other than Gerda, Kai and the Queen. I would challenge anyone to read the original and say they wouldn't watch it as a movie.
I have nothing against Frozen... except for the fact that it means that now Disney will never make a movie of The Snow Queen. It was my favorite fairy tale as a child, and I've been hoping for a Disney movie for thirty years or so.
Gerda melts Kai's frozen heart with her tears... saying she cries on everything to fix it is kinda flip.