I wish more than anything that Hunchback made it to Broadway. I didn't get a chance to see the La Jolla or Papermill productions in person, but from the clips I saw, it was a brilliant adaptation of film to stage. The staging looked inventive and creative, the "Bells of Notre Dame" number (tough to pull off, considering that in the movie, the events during that song would only work in film, and couldn't realistically be done in a stage production) was an awesome new take on that song.
It was a deeper, more sophisticated understanding of the story - the creatives threw in a bit of Frollo's backstory that made him seem like a more well-rounded character, and the staging where Arden put on the hunch and Quasimodo clothes at the end of the number was one of the coolest things I think I've seen in a theatrical production, and it was just as impressive on film (would've given anything to see that live on stage, in person.)
Hellfire in particular was adapted brilliantly - the orchestrations with the choir sounded super impressive (Menken made that music sound more vibrant. The ending sequence of the song, with Page singing as that large sounding choir accompanied him in the background, has to be one of the coolest sounding, most finely orchestrated bits of music in the Disney-on-stage canon), and even the positioning of the choir around Frollo as he sang was beyond cool (I was wondering how they'd adapt the choir that materialized in the animated film for the stage realistically, and they pulled it off in an equally successful way.)
Much was said about the chorus having dialouge-y lines and how well that played, much was said about how accessible the show would be do crowds looking for the Disney movie and being a bit taken aback by the new ending and some of the changes made, but I think it would've run successfully if Disney had transferred it!