The second part of the film "Funny Girl", with the exception of "My Man" and the funny "Sadie, Sadie" is a distinct letdown after the wonderful first half. "Oliver!" holds up rather well, even though the Nancy, well-sung and sympathetically acted by Shani Wallis, was much sunnier and less gritty casting than the original Georgia Brown, who (based on recordings and photos) was more in line with what Dickens wrote.
I saw the 1983 revival, and LuPone and Moody were both very good. There was some news items about the original boy cast as Oliver being replaced either late in rehearsals or during previews. One big difference in the stage version is that Oliver's character is almost a supporting role, with much more of a focus on the other characters. Or perhaps that was my impression of the kid who finally did the role. The production I recall used a recreation of the original sets and staging. I was surprised that it closed so soon though.