My own conclusion ... is that most, if not all, of the singing on the "Gypsy" soundtrack IS Rosalind Russell
If you've compared the tracks in the film with the more recently released all-Russell tracks, I cannot imagine how you can conclude it is all or even mostly Russell in the film. It is clear what in the film is Russell (Goldstone, Small World reprise, a lot of Rose's Turn), everything else is Kirk, who is indeed working hard to match Russell's growl.
and in particular the version of "Rose's Turn" on the soundtrack is hers (the one released on CD as a supposedly previously unissued version; the one they claim was the track from the original album is probably the "professional singer"'s version Russell said had been recorded but not used).
Both versions of "Rose's Turn" (the one heard in the film and the one heard on the original vinyl LP, both of which are now available on the CD) are a mix of Russell and Kirk, but the LP version has more Kirk in order to make for more pleasant repeated listening. If you listen carefully, you can hear that the sections that are used in both are identical.
Concerning "Together," if you've listened to the vocals on the deleted scene, you can hear that Russell, Malden and Wood all singing for themselves sound like a night in Hell itself, and that the brief 32-bars-and-out solo version recorded by Kirk was strictly for inclusion on the LP and could never have been used in the movie.
If it is important to your Jule Styne project to analyze this issue accurately, I urge you to contact some professional people with expert and first-hand knowledge of this project, because I guarantee you that the conclusions that you are stating in your post are erroneous. You don't have to trust my word, there are many experts that are accessible to you, and if you like you can PM me and I'll try to put you in contact with a few. (I wouldn't share your opinions about Merman with them, however.)
EDIT: By the way, Russell was a notorious liar and, when she published her memoirs, alienated some long-term friends and associates, some of whom refused to endorse the book because of the self-aggrandizing inaccuracies it contained."Oh look, the neighbors are recording us."
I hope this helps.
When I lived in L.A., I had a chance to go through the Gypsy productin files at USCC.
Roz was originally dubbed by Fox dubbed Eileen Wilson. Roz filmed to eileens voice.
then it turned out that Eileen had a recording contract with a small record label.
The label would not let Eileens voice appear on the Wrner Bros records LP, hoping to force Jack Warner to have the Gypsy soundtrack appear on their label.
Warner ardered to get another dubber. At this point Roz chimed in with I can do It, etc. and her vocals were dubbed one line at a time to the already recorded songs.
this seemed okay until a test screening where the audience made it clear they hated rozs vocals.
then lisa Kirk redubs one line at a time. She probably would have dubbedin Together Wherever we go, but the song had already been dropped.
Its all Lisas voice on Rose Turn on the LP, but it is a mixture of Lisa and Roz in the film.
One of Natalies vocals is dubbed only on the album - Little Lamb. It was considered good enough while watching Natalie in the film, but as a vocal only experience it was not. So Jackie Allen sings for Natalie on the LP and CD, but not in the film, only on Little Lamb. Just listen to the onle line "oh why do you look so blue?" and you can clearly hear the difference.
I would love to hear the Eileen Wilson vocals - do they even exist?
just wanted to add on - Have an Eggroll, Mr. Goldstone is Roz, because, for some reason, it was decided to perform that LIVE on set and not prerecord.
you can hear that Russell, Malden and Wood all singing for themselves sounds like a night in Hell itself...
oh boy : o
Okay, that made me LAUGH!