It's always been a text-based game. The characters used to have a paragraph describing their appearance instead of an image of them. While a couple of cutscene assets have been introduced, they're really time consuming and right now I think Thresh is trying to get the next section of main story completed, which much of his fans eagerly await.hopefully sex scene art and audio will be added
I don't foresee voice acting being added anytime soon, which would increase production costs and create an instant backlog of different characters that suddenly need all their stuff voiced.