These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Adaptation Displacement: Unless you're a fan of TCM (Turner Classic Movies) you've most likely never even heard of the original non-musical movie (1927). Or the 1926 play (now known as Play Ball) the film was based on, whose story was actually Ripped from the Headlines.
Angst? What Angst?: The one innocent inmate in the "Cell Block Tango"; while the film averts this, the original Broadway recording features her sounding more frustrated and annoyed by her situation than anything and sounding rather deadpan and matter-of-fact when delivering the line, "Uh-uh, not guilty".
Family-Unfriendly Aesop: The legal system is a farce and a circus, and fame will let you get away with anything. Additionally, if you are falsely accused of murder, you're more likely to get executed than someone who did. The saddest thing is that much too often this is true.
Hollywood Pudgy: Roxie snarks at Velma to "lay off the chocolates". On the other hand, Roxie isn't exactly a nice person, and might just want to snub her back because Velma insulted her before.
The film fits this trope even better than some of the stage versions, because in the movie, the line comes right after Catherine Zeta-Jones completes a rather intricate and impressive one-woman dance routine... while several months pregnant.
At live shows, Amos's Woobiedom can be measured empirically by listening to the audience's "Awwww"s after "Mister Cellophane". "My exit music, please." (silence) He tends to get lots of applause after leaving the stage, though. Alternately, playing Amos (and Mr. Cellophane) for laughs is a valid choice, and could be pulled off well.
Uncanny Valley: Roxie, as well as the reporters, in "We Both Reached For the Gun" in the 2002 film version. Oddly enough, the reason it's so eerie is because it's actual people made up, dressed up, and choreographed like marionettes (or a ventriloquist dummy in Roxie's case), making them inhuman enough that it's just plain creepy.