A common criticism of pictures derived from plays, but I've always failed to grasp why this constitutes a fault. Because film can achieve effects not possible on stage, must it always do so? If it's a choice between queer camera angles, & well-written & spoken dialog, I'll take the latter. And in this particular picture, camera-work that drew attention to itself would probably detract from the power of its raw, hard-hitting dialog.
I saw this film again on TCM a few months ago, and remembered how much I liked it the first time...but I think it's a fair criticism to make of any film when the story gives it an organic opportunity to get outside the walls and the film 'turns down' the opportunity. Five Star Final passed up a few chances to do this, although my sense was that technical limitations were also at play here, as they were for a lot of films shot in 1931 or so. Also, when I say play-style, I mean a lot of master shots, and few close ups and reverse close ups and few tracking shots, which also point to technical issues.
There are some plays that almost demand to be filmed in a play-style like 12 Angry Men, and if they tried to bust that story out, I'd be mad for the opposite reason.