This changes all the voice lines from the related .pak file to a text to speech of the event name being played/queued from wwise. For example, if you have the bulldozer version, when he loses his visor, it would play a text to speech audio of "lost visor" or something similar.

This goes along my guide to help out choose audio a little more. https://modworkshop.net/mod/51880

I recommend you set your audio settings to:

Master Volume: 100
Music Volume: 0
VO Volume: 100
Operator VO Volume: 0
SFX Volume: 0
Cinematics Volume: 100

I also recommend installing this custom heist (https://modworkshop.net/mod/44111), it's helpful for all enemies (except cloakers)