The only adjective of those three I agree with is "unique".
I thought it added nothing to Neil Gaiman's original and fantastic story (unlike the movie). David Greenspan was campy, self-indulgent, and drained all menace from the Other Mother (her death song was ****ing atrocious). In fact, the production as whole drained much of the menace from the story. Songs were unmemorable and repetitive, performances were amateurish. Jayne Houdyshell was fantastic, as was the lighting and overall "look" of the piece.
But I walked out thinking, "Most of that was avant-garde for the sake of being avant-garde."
"...everyone finally shut up, and the audience could enjoy the beginning of the Anatevka Pogram in peace."