A lot of the current sounds in SN are poor quality, and some objects don't even have sound effects at all, which is odd. I think a sound design rehaul which incorporates more voicelines, sound occlusion, and the old ambience, could better for the game's experience.
I made a short video to show what adding different audio can achieve and how it can affect the atmosphere of the game.
https://www.youtube.com/watch?v=M6gPvJ4p1f4
just an example video of how i want the audio to be in SN