I think I know what they're driving at when they say, "It's a play with music."
I actually made a similar comment to my friends, the night I saw it on Broadway. I said, "This feels like a play with music, rather than a musical."
It was a compliment, actually, and I was even asked at the time what I meant by that.
The show focuses on the acting, and makes it the Number One priority above all else... and the "dialogue" whether sung in verse or spoken. It's not a "singer's show" (and certainly not a dancer's show). It's an ACTOR's show. It's clearly approached that way too, from the set design (that looks more like a play's design than a musical's), right down to the blocking and direction. It wasn't an accident, either, if everyone involved seemed to be creatively approaching it that way.
But I put in a few extra words in my comment, when I said it "feels like" a play with music, rather than a musical.
They said it WAS a play with music, rather than a musical, and that's not true technically.
By definition of genre and format, it's a musical.
But none of them envisioned it that way... and I think they were successful in their goal, since I clearly got what they were doing.
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22