Some of the sound cues are maybe a little too subtle. The 'thud' when enemies are against the glass (which is a pretty big deal) is a lot quieter than prev builds, and I can totally see why some people are basically brute forcing the switch minigame because the audio cues for a 'right' vs 'wrong' light position in the sequence are very similar-sounding...
EDIT: Okay so actually the glass thump doesn't even play sometimes! I've seen characters change state right in front of me without making a sound!
The sounds of like the gas hissing and Nile's door opening are fine though.