That does not really answer how it is handled. Are lines changed or are there weird blank pauses in the dialogue where the words should be? Are there alternate recordings in the patch? I've liked voice acting when it's not selective and you get to hear kinky shit that is atypical to say, your average anime dub.
I think if a game is kind of shallow in it's writing, the voice acting might add a hook to the game. But these characters are pretty lovable in their own merits, seems like it could detract. It might actually work great for your second game since that's pretty fresh. It is hard to adjust when voice acting is added late, because we kind of already had their voices in our minds. We can fantasy cast anybody, where as when you get porn game voice actors, best you can broach is like early 2000s anime dub quality. At least if I'm using Sylvia and the Awakening as a baseline. I'm almost afraid to listen to the audio because it might shatter my image of the characters. What if Paris sounds like an 86 year old chain smoker? I'd laugh, then cry.
I get that you can mute it, and it's your choice to make. But I do want to make sure you know your characters ARE strong and they do stand on their own without a need to create any additional draw. So should something go awry with the plans and the voices end up being delayed or cancelled, you can be confident we love these girls enough to keep reading.