>>>The only real reason to record the Broadway company would be for Michael Ball<<<
Okay!!
There's going to be a market waiting out there for that CD - from his UK, USA, Australia ( where he has done a 5-city concert tour ) and world-wide fans (check out the stagedoor of the NYC Opera

) who can't come over to NYC...plus Broadway theatregoers.
I cannot really imagine a major musical theatre production where Michael Ball headlines one of the roles and no CD has been produced. If he had been asked to release a title song ( Sunset Boulevard) even before the OLCR was released, ALWebber must think very highly of his vocal talent. I remember seing an interview when Michael had just taken over the role of Count Fosco, when ALW told him that "you commanded the role so musically well"!