As usual, Growlers you show great taste.
The stories of Rodgers and Sondheim working together are far from pleasant, and like I said I do agree with Sondheim that there are a couple of bum songs, but overall I love the cast album too.
I can't tell if the libretto was changed at all for Pasadena. Laurents was still alive, so maybe? The liner notes of the now out of print CD speak about it being revised but are frustratingly vague except for the specifics (ie the original lyrics for Be Alright, Everybody Loves Leona is restored, and the CD has brief bits like We're Going to the Lido that I think were just not recorded on the original, but it's been a long time since I've checked the published libretto from the library.) I know it got good reviews and an online friend spoke highly of it (of course the original orchestrations are missed.)
PJ, Collins' version IS great, I agree.
Home--they performed Rex and Mama but not No Strings or Waltz? I'm a little surprised Encores hasn't done Waltz--it could be a great showcase for a strong cast.
There's a fascinating interview online with Laurents and Sondheim as well as Beni Montresor but interestingly no Rodgers from when the show was created on Camera 3. Here's part 1
http://www.youtube.com/watch?v=PRc17BUocfs (How handsome Sondheim was...)