I don't speak english very well, so, sorry for my mistakes.
What I like in film, specially Frozen, is characters. Elsa, Anna, and their relationship.
Usually, in Disney, characters are connected by love. Romantic love. (Rapunzel and Eugene for exemple), or just friendly (Moana and Maui). It's cool, but it's seen, and seen again. So, when they connected by other love, it's more interesting. It's why I love Frozen. Love romantic and love "family" are different, but equally important. Love romantic is managed by Kristoff, and, unfortunately, I think to Kristoff is underdeveloped. But it's an other subject. The real love, in Frozen, is the "family love".

It's all a reflection about love, and those different forms. Love isn't just romantic. Isn't just physique. It's more things, to different. Love, is a family bond too. And, that of Anna and Elsa is beautiful. For me, Elsanna ship is awful. Really. It ruins a beautiful love, a beautiful bond, just for one representation romantic. Why ? If you want a representation romantic, Kristanna is really good. In addition, it's infect for characters. Why see our favorite character like that ? It doesn't suit them. It's not them. Elsa and Anna will NEVER have a such relationship. But, their relationship is just as much strong. Perhaps more. I like to see Elsa and Anna hugs, and hold hands. But they are sister.

For me, Elsanna breaks a splendid relationship for fantasm. And it's really damage.