Played this before the update, played it again after the update as well and it has a ton of potential. Great setting, story and models. I liked the NTR route of the main girl as well. I mainly have two gripes with it.
First one is, I don't know if it's just me but, the Russian officer's command storyline wasn't really that satisfying as it was just different levels of intercourse. Iirc we didn't see anything relating to her character development or why she's there keeping an eye on us. I did play those stories in my first playthrough but in the second part I just skipped over them so maybe I forgot some stuff though.
I'm guessing there is a similar issue with the library lady as well but I didn't play through enough of her story. She is interesting but I didn't figure out I could google blackstar foundation and thus I didn't get to meet her until later into the game, which made visiting her every Friday, skipping over the other days every week, a bit of a chore.
Second is the battle system. It's a little unintuitive, I generally don't know what I'm doing and just use the 4th+2nd skill, shoot with the gun and hope for the best. I have no clue you beat that special boss. Idk, maybe I'll get accustomed to it over time.
If this was a bit too long and nagged a little too much I'm really sorry lol. And good luck with the next updates.