3:16 onward sounds like they're near a generator. It's machine noise for sure, so I could see it being loud in the scene. I've tried two speaker sources and headphones for that scene in particular and I'm not finding it overpowering. If anything Durai's dialogue throughout is a little heavy in the mix. He seems a bit loud, but he seems about even with Lizzy as far as volume levels go.

I'll try another source for that scene and get back to you.

7:33 sounds more like a rocker switch than a mouse click. I could see a machine grinding to a halt pretty quick having its power cut, but it does feel a bit quick to me as well.