This tiny AddOn will disable the centre talking head frame and voice acting that pops up during world quests.
Not working in Battle for Azeroth?:
If you've updated to version 8.0.1 and you're still seeing the talking head frame popups, you'll need to turn it off then back on by typing /swq t. You should only have to do this once.
/swq t - Toggles on/off.
/swq withered - Automatically disable the addon during the withered army training scenario.