DREAMGIRLS was always planned as a "pop" styled album of selected songs from the show. They never intended to record the entire score. A shame. At least the concert cast got recorded but it is live and the cast isn't as good.
Someone mentioned OKLAHOMA! having songs restored to the CD. For those of you who don't know, OKLAHOMA! was the first cast album to sell over 1 million copies, and the success led to there being cast albums made of most musicals ever since. This was in the days of 78 RPM's and the OKLAHOMA set held 6 records covering 10 songs, the Overture and finale. a year later Decca issued OKLAHOMA Volume Two - a 2 record set with 3 songs they left out of the first album. (Lonely Room, It's a Scandal! It's a Outrage, and The Farmer and the Cowman - complete with dance music covering 2 sides.) When the Long Play (Lp) record was introduced in 1949, Decca only issued the 12 sides that made up the main OKLAHOMA! album on LP. Volume Two became a very rare collectors' item. The CD restores those 3 missing songs (and puts them in their proper place in the song line-up.) The only odd thing is that for Volume Two they had Alfred Drake record "Lonely Room" which is sung in the show by Jud. (Maybe Howard Da Silva had left the cast by then?)
Back on topic, I was sorry that so much material was cut from GRAND HOTEL including "The Boston Merger" and the telephone sequence from the opening.
Cast albums are NOT "soundtracks."
Live theatre does not use a "soundtrack." If it did, it wouldn't be live theatre!
I host a weekly one-hour radio program featuring cast album selections as well as songs by cabaret, jazz and theatre artists. The program, FRONT ROW CENTRE is heard Sundays 9 to 10 am and also Saturdays from 8 to 9 am (eastern times) on www.proudfm.com