In all honesty, the studio album sounds better than the show itself because it is produced as a pop album and truly works sonically when played alongside current pop tracks. It also has effects that are popular in pop music that are sadly lacking from the live performance. Unless it were a LIVE recording (which also would be a fun way to do a cast album), I'm afraid the songs would come off more B'way than pop, as they do in the theatre. That's fine, but I really love those fully pop orchestrations on the studio recording.
My preference for the Broadway cast would be a live recording of the full show. The energy of the audience is what sets the show on fire. But considering there already is a pop-styled studio recording of the score, I don't think it would make much sense to do the same thing again with the Broadway cast. Either a standard cast recording or a live recording for the Broadway cast would be best and offer more variety to the recordings of the show itself. And I've always said that I think a recording of the songs by the pop stars that inspired the material would be MASSIVE hit. Wait a year or so after the release of the Broadway cast recording and the producers of the pop album will make serious bank. Hell, I'd invest in it if I could.
"What can you expect from a bunch of seitan worshippers?" - Reginald Tresilian