Having just finished playing for the first time, I personally had almost no issues with the dialogues - yeah, sometimes the internal ones did appear to drag on a little bit too long, but the content itself is original and somewhat refreshing, therefore it did not bother me that much. The way I see it, it's actually one of strong points of the game, the plot and character development itself being the other ones. Without first setting up the stage and establishing each girl, the impact of any sex scene might not feel as strong. Those games that do it well are the games that leave an impression on you, not the amount and variety of fu**ing, imo.
The only other issue I noticed is some errors in the text: wrong pronoun used / line of dialogue assigned to the wrong character / some typos. And maybe its me, since I am not a native speaker myself, but some lines / expressions don't convey the meaning that they're supposed to, almost as if they were MTL-ed, but, once again, since there is plenty of lines exchanged during every single conversation, I did get where the author was going with it.
Thanks, and looking forward to see what happens next, now that multiple brand new characters have been introduced.