I really love this game as it's one of my favorites and the one I've played the most. I've done at least 9 playthroughs because of that. However, I do have some criticisms or such about each part.
Part 1:
The MC's abilities are supposed to be super strength and mind control. Yet, he healed from two broken legs and a broken neck in under 5 hours. We know it was under 5 hours because if you go the Tiffany route (instead of Claire), he was supposed to meet her after school when he was done talking to Nicole. When we see Tiffany, she said it has been 4 hours since she began waiting. This healing never gets explained and is never used again. Whether someone healed him or it was somehow him, nothing is ever disclosed about it.
After the MC "killed" his dad, a distress signal went out. MC didn't even know about it and it never gets explained how it got sent. Small thing but still should be explained.
Not sure if it's because I installed the incest patch, but just did a best friend run not long ago. The dialogue kind of doesn't make sense sometimes. Like when they find out at the resort that he's with Iris, they make it seem weird that he's boning his best friend. "That's not the main issue. She's your..." That's the same if you do the incest route. Best friend shouldn't be weird or anything. When Chloe is revealed to be Caroline's daughter, she says "It's almost like we're cousins." Even one of the lines the MC uses says "my mom" instead of "Iris' mom". It's like it is trying to be incest without actually being incest.
Last thing, the choice of getting Iris pregnant has no impact on the story. Don't know about others, but I don't like when I have choice and it means nothing to the story.
I might be forgetting something, but that's about it for Part 1.
Part 2:
As I stated, the choice of getting Iris pregnant doesn't matter. It starts off with their child asking how their parents met.
I personally don't like how it goes back between the present and six months in the future several time, especially since we see those scenes later as well.
Speaking of going back and forth, we already kind of know the ending. It's Iris and the MC telling their child how they met and what they went through because we see them telling their child. We all figured nothing would happen to the MC, but that one scene takes out any tension there was. It'd be like Oda drawing the final panel of One Piece in the middle of the story to spoil the ending. Maybe the ending will be past that and add more. Just something I don't like.
The MC should have A LOT more powers than he's shown. Chim (The Chimera) said they were going hunting every night. MC said he doesn't even remember how many lives he's taken. Combine that with the fact Chim's statement occurred a month to three months at most after their move, MC should be OP with all kinds of powers. Even if it was just a month left when Chim said that, that should give him over 30 powers.
Speaking of powers, he has: strength, mind control/reading/manipulation, shapeshifting (MC was stupid for not using it when he went after his dad after returning and bumped into Iris), short distance teleportation (which evolved into just teleporting and teleporting others. Gotta give the dev credit as this was foreshadowed in part one when Chim stated taking powers to make their own could evolve them as well), cloning (stole from Cole), and blood blades (I'm assuming he got from the guy he killed when Isabella went with him). He's also able to grow a person's (in this case Chloe's) hair wherever that falls under. Might be one or two I missed. That does leave a mystery power he got from Evelyn if you leave her alive. Since I played both routes where you also kill her, he still gets the blood blades even without receiving the data from her so it makes no sense for that to be the power she got for him on the thumb drive.
On Evelyn, I do dislike how she got caught betraying Chim (supposedly by Cole) that quickly. Her specialty is espionage, yet Cole caught her that fast just because she tailed the MC that night to Violet's bar? It makes no sense, especially since she had been tailing the MC for a while. All those other times she tailed him Cole or whoever didn't suspect she had betrayed Chim? I kind of get Cole is good because he was able to fool even Chim, but I don't know. It just seems like the dev wanted to remove her from Chim's side by killing her or adding her to the potential harem (since you do get to decide whether he has a harem or not and who it includes, which is great of course).
Only other thing is a personal preference. I wish more of the girls had some kind of pubic hair. Only Iris, Emily, and Nicole (the latter two aren't even love interests yet, if they ever will be given what Nicole did to the MC in the past) do. Violet did in her first scene but that disappeared.
My favorite part so far I believe is when Iris tries to shoot herself only for the MC to catch the bullet and say, "Congratulations. For the first time ever, you managed to piss me off for real." and Iris immediately apologizes. It's like she realizes he's only been letting her mess with him or beat him up all this time, and if he was ever truly angry, then none of her beatings and such would have any effect on him.
Anyways, these are my somewhat criticisms of the game so far. Just wish things were expanded on more I guess, especially the MC's powers. Nevertheless, it is a great game with a really good story and sex scenes. Characters as well. Hope dev doesn't take it personal with my opinions here as I'm just sharing my thoughts on things I think could be better or something. I'm still looking forward to Alice confronting them about them fucking now that she's free from the parasite as well as all of the future updates.
As these are only my personal critiques, I want to stress I love this game very much as I stated it is the one I've played the most. Story, powers, characters, sex scenes, etc. are all great and I wish the dev could keep it going for a long time even though the end seems near. Also, I might be wrong on a few things. Even with how much I've played it, I'm still discovering a few things I missed before. So if I'm wrong about something, then I apologize and you can just ignore it.
I know this would usually go under a review (which I would give the 4.5/5 stars even with this long post of critiques), but wanted others to be able to respond with their own opinions even though I likely won't respond to them, lol. Assassin's Creed and Xenoblade are eating my time too much to have discussions with others. All this said, keep up the great work, dev.