Welp, I finally played the update. Pretty renders as always. Good writing of the slimy teacher, I dislike him already. The rest of the update was fine. As expected, short, but some interesting side developments. I wonder how many will be pursued based on previous comments from L&P that he needed to shrink the tale just to have any realistic chance of completing it.
One thing that does stick out at me as deserving of a mechanics change:
Near the end, in the dressing room scene, I was unable to tell Ellie she looked sexy because my filthy points were too low. The only way I could see that I could increase them was to go and get flirtier with Sam (whom I have no interest in).
That doesn't make sense to me. While I agree the idea of simple lesbian temptation is a long step from lesbian incest, I think that the path to that attraction should be a combination of Filthy + Lesbian Temptation points.
In other words, when it comes to females, LT should be added onto Filthy to determine if a score is high enough to progress with the female. Logically, if I've been increasing my Filthy points reasonably and I've emphasized them through Patricia and Dylan, I should, by the end of 0.5, have enough combined corruption to be able to tell Ellie she looks sexy.
That's my pitch on game mechanics. I'm fine with progression speed and, of course, love the pretty pictures. I look forward to seeing some Dylan development in the next installment (I think that's what I read, but I'm going off memory).