The problem with the musical are not the songs, some are good and definitely 'growers', the problem is that they dont really assist in telling the story. Instead, they are just songs for atmosphere and mood but they dont propel things forward in the context of the musical itself.
Musicals are odd.
Some musicals, like "Joseph and the Amazing Technicolor Dreamcoat" are entirely sung. Therefore, by default, the music MUST tell the story. If it doesn't, nothing will!
However, it doesn't mean that every single song is a great. Some are just for entertainment.
Look at "Sound of Music". The opening number is the title track. What story does that really tell? That she likes nature? That she likes singing? One could argue that it shows she's anxious to leave the convent, but that's a stretch based on the lyrics. Then there's songs like "Doe a deer...". It's just a simple song meant for entertainment, not really to advance the story.
The same could be said for other musicals like "Camelot". Some songs do advance the story some, some do not. Even "Rocky Horror" is like that. Some songs are just silly dance routines - some tell the story.
From what I've heard, SM is the same. Songs like "Rise Above" is the main character reflecting on his life - hence it does advance the story. Other songs may work in the context of the show and are there for entertainment more than story. To me, it sounds like a typical musical.
And really, while I love B&E, if I see this, it's for the theatrics. Great music is secondary. I saw the Beatle's "Love" Cirque de Soliel in Vegas. Same thing - great music. But really, I wanted to see the theatrics. "Love", by the way, was nothing at all like a play - rather a series of acrobatics and dance fit to Beatle's music. I wonder how much classic Broadway likes that?