I never saw the show, but I think the score is magnificent. I have always wished that someone would try to rework the book (in a post years ago, someone said the problem was that the book tried to cover too much ground). I have to admit that I loved the orchestrations the original OCR, loved the performers, and don't see any reason to purchase a scaled down version. The lushness of the orchestrations was one of the great things about the OCR.
I have to acknowledge that, other than Follies, I have rarely purchased additional cast recordings, if i thought the original was great, and I rarely thought the newer version was as good as the original: exceptions: IMO the recent Oklahoma is significantly better than the dowdy original one; the Donna Murphy TKAI was much better than the original (if Gertrude Lawrence ever really had a good voice, it was long gone by the OCR); and, sacrilege, I prefer the Lansbury Gypsy to the Merman one, because I guess I just never loved Merman's voice.