Caroline-Q-or-TBoo, I am so glad that you like the recording. It is true that the clips cannot do it justice.
In the same vein, however, the recording cannot do justice to what the score does for the show. I do not want to be overly critical of your critique, but to say that the score does not do the story justice without seeing the show is unfair.
The score is multi-layered, with the requisite production numbers, but also beautifully inspiring, intimate moments. "The Letter" is a fine example, as is "Deep into the Ground." Even "Electricity" for all its excitement is surprisingly intimate. What we learn about Billy in that song is so personal.
I would respectfully disagree about Jason Robert Brown. While a fine composer, I am not sure he is the man for the job. If you can get your hands on the text, please read Sir Elton's notes in the souvenir program about the creation of the music. It is an interesting read. He talks about the use of distinctively English musical styles, in particular the vernacular of the English music hall. I think it illuminates what Sir Elton sought to accomplish.
"I am open, and I am willing,
For to be hopeless would seem so strange.
It dishonors those who go before us,
So lift me up to the light of change."
Holly Near