So Long and Thanks for all the Heroes?

[Logan Darklighter]

If I keep playing this, I'm turning voices off. Completely. Jesus that's some bad voice acting.

I understand. Unfortunately, some of the cut-scenes in some signature missions do not have bubbled text. That's pretty rare though. On the other hand, even though the HUD will be blanked out during a full cutscene, the dialogue is still posted in the NPC text. So what I do is set aside a separate tab for "NPC Chatter" just in case I need to catch something important. (I did that for COH too.)
I will say - some of the voice acting is INTENTIONALLY bad/parody.
(There is ONE mission with Foxbat taking over a TV News network where you might want to turn on the voices just to hear it the first time. It's goofy and a total parody of a recent Will Farroll comedy about a TV News Anchor.)
But yeah - if you prefer reading the text - then for the most part, turn off the voices.