Most of the audio introductions sound a bit cheap and mostly out of place IMO. It would be nice if we could deactivate them via a mod.
I think this is possible. I'll see if I can find something.
I think it is possible, since the RootTemplates for NPC characters have a SpeakerGreeting property. The real issue would be whether overriding the RootTemplates of characters defined in the specific levels (ie every interactable character) is possible, which is something I haven't tested yet.
There would also be a lot of NPCs to silence as well.