The show is 90% sold out through Mid August, and is 95% sold out for the weeks of Thanksgiving and Christmas. Even in late August its about 60-70% sold. The only shows with better advances currently are Hamilton, Harry Potter and the Cursed Child, and Springsteen on Broadway. I don't know what you mean by lack of demand. Is the show perfect? No, nor is it a disaster along the lines of Charlie and the Chocolate Factory, The Addams Family. If this is someone complaining about the lack of this show on the secondary market for scalpers, who cares? Its on scalpers fault for not understanding how a family show sells. Frozen was never going to be a Hamilton, nor was anyone expecting it to be.
Its a show critics going in had their list of "Let It Go/Die" and Ice themed puns pre-written to pan the show, but very few actually used them. Were critics as surprised as they were for Aladdin? No, but they also along the lines of The Little Mermaid whose reviews were titled New 'Little Mermaid' musical is Beached on Great Wet Way (NYDAILY NEWS) or Little Mermaid: ON Broadway Just Fish out of Water (Wash Post), or Tarzan that the NYTime's review opened with "The tree-surfing title character is not the only creature sailing through the air in "Tarzan," the giant, writhing green blob with music that opened last night at the Richard Rodgers Theater."
Disney's marketing team got great reviews to work with for pull quotes. The show will likely also get a minimum of 5 Tony nominations for Costumes, Set Design, Lighting, Sound, and Score. The show is not a Ghost, Spiderman, or Finding Neverland, where the nominating committee will seem bent on snubbing it. That will be either or both Escape to Margaritaville and Summer. Disney's only real competition for the technical awards is Spongebob, which I am sure no one thought would last into 2018, nor would it be the 2nd best reviewed musical of the season. Overall though, it looks like Frozen is in pretty good shape, but we will truly know how well its doing come September/October as it eats through its initial advance.