As far as digitally removing Christina, I don't know if they did, since she only appeared with the female ensemble for a brief second (and you couldn't see their faces, so it easily could've been the tour ensemble). Also, please remember that the only reason for this Chartiy production from the beginning has been to market a star in it. The whole marketing campaign on Broadway was "Come see Christina Applegate as Sweet Charity." So now on tour, they would market it as "Come see Molly Ringwald as Sweet Charity." Because, I for some reason think it wouldn't appeal to mainstream America without a somewhat recongnizable name in it.
Personally, I think that Ringwald will deliver an adequate performance and please audiences. I saw the revival at it's second to last performance and was very impressed with Applegate, and I'm hopping that Ringwald will deliver as well.
"Men should be like kleenex: soft, strong, and disposable."~Clue