Conversation so far:
who did the choreography for Carousel the musical?
Agnes de Mille did the choreography for Carousel the musical
what is musical treatment in the Carousel musical article?
The Carousel cast album of the 1945 Broadway production was issued on 78s, and the score was significantly cut—as was the 1950 London cast recording.

Question: why was it cut?
Self-contained rewrite: why was the Carousel musical score signficantly cut?