You can uncap the cutscenes FPS from 30, by unchecking the box in graphics settings. Don’t be me and beat ACT IV before noticing.
Also checkout enabling tool tip comparison and advanced tooltips.
And audio effects for loot are really spiffy especially if you use headphones.
There’s also settings to play with toggles for channeled abilities as well.
I think they wanted that cinematic look and feel that low framerate gives you, but then it makes me puzzled why they didn’t go with 24, which is the more standard film framerate and presumably what their pre-rendered cutscenes are running at.
Another theory is that maybe they were worried about certain cutscenes having an unstable framerate on lower end hardware?