Yeah the sound is awful but they’re currently working on an audio fix wait and see for a new massacre
Well zusi is a real life simulator used to train real drivers so the sounds and operations are realistic. And skyhook doesn't really have a good track record when it comes to sounds even though they didn't have access to the sounds but that doesn't mean they should release locos with unchanged/terrible sounds
While the sounds of ZuSi BR187 are better than the TSW3 BR187, the ZuSi BR187 isn't still accurate. The train talking is TTS (I think Google's TTS), and the traction sounds are the sounds of a BR186. Still better than TSW3 BR187 though..