Again, I haven't seen the Broadway show, so I can only comment on the film. I think that Elsa's powers are implied. The dress is a stretch, but it looks icy, so I feel comfortable assuming it is an icy dress. When she is free and relieved, she creates an joyful snow creature. When she is afraid, she creates a scary snow creature in an attempt to (safely) scare Anna away (Marshmallow never actually hurts her). As for the "love experts," those are Kristoff's words, and growing up with them, he would see them as experts. And, truthfully, they see through Anna that she is in love with Kristoff and not with Hans, so in some ways, they are love experts.
To me, the two biggest problems in the film is that Hans's change is completely out of left field. When he first meets Anna, as she leaves, he looks upon her fondly. I think that look should have been one of contemplation to hint that it's not about love. When he reveals himself to her, it's a little too evil villain monologue-ish. I would have preferred to see it be a little more subtle. Maybe he's even apologetic that he won't kiss her before enacting his dastardly plan.
I also think a case could be made against the placement of "In Summer." But, clearly audiences ate up every minute in the film. |