For someone who was just killed by his Arch-Enemy and is now trapped in a teenage girl's mind in another world, All For One seems to be taking his predicament in his stride. That's because he has a plan to take advantage of it to get back home and pull a Villain Override.
While afraid, the kids that were kidnapped to be part of the governor's Deadly Game aren't as freaking out or taking their fear and anger out on each other as much as you would expect.
Watching Luz kill the other teams at the Death Camp after slaughtering some of her new friends, had many readers cheering for her.
While this action doesn't help her Hero with Bad Publicity status, Luz turning the squad of Dirty Cops into Ludicrous Gibs made many readers very happy, especially the sheriff who made Luz's daily life hell by bribing the local facilities to ban her and had a Slasher Smile towards her supposed corpse.
Luz brutally killing Jonah, the hitman that murdered Camila, had readers cheering.
S1: Governor Rodger Maxwell, the Governor of Connecticut, takes advantage of the Mass Super-Empowering Event in order to try and wipe all superhumans from the map. Kidnapping 33 superhuman children, Maxwell has them all compete in a Death Game where they are split into teams and are forced to kill each other. Seeing Luz Noceda's potential through All For One, Maxwell manipulates the two other teams with the promise of money to spearhead an attack on all of Luz's teammates, including Julia, getting her to snap and kill the rest of them to steal their powers so he can blow Luz up, before planning to expand his genocidal goals. Despite his arrest, Maxwell caused the deaths of 27 innocent children and is responsible for the deterioration of Luz's mental state.
S2's "Death To Normality" arc: Jonah Smith is a gigantic, sadistically violent assassin for Tyler Wittebane, known as the worst of the superhumans. Raping and murdering his wife before gaining his Quirk and becoming an assassin, Jonah enjoys taunting and causing suffering to his victims before killing them. Getting orders to assassinate Camila Noceda, Jonah taunts and throws the scared woman around as he laughs at her before killing her. During a brutal battle against Luz which destroys a chunk of Gravesfield and kills countless people, Jonah has Camila's body teleported to be destroyed by Luz, making her think she killed her mother for no reason other than spite.
S3's "Truth, Lies, and The Inbetween": Tamashiki Shigaraki, All For One's father, is a disgusting man despite his short appearance. A parliament member and devout advocate of Anti-Quirk policies, Tamashiki took advantage of the homeless Aiya Kagurami, raping her when she was just 16 before promptly abandoning her, as well as Rikitasu and Yoichi, to suffer in the streets. His actions managed to even leave a sociopath like All For One enraged as he tracks down and murders him without a second thought.
Luz is also this when she's under the influence of her Quirk. Even with her Psychotic Smirk and Lovecraftian Superpower moments, you can't help but cheer for her when she takes down Asshole Victims in this state.
Let's not forget All For One again. He's dangerously forward-thinking, always having a plan up his sleeve to carry out. Luz notes he gives her Creepy Uncle vibes but is an effective Evil Mentor. There is no limit, All For One would go achieve his goals e.g. Taking Over The World, Corrupt the Cutie, Villain Override or becoming a Multiversal Conqueror, which is only one reason why he's so scary.
Les Yay: While not intended to be a Love Interest, some of the readers ship Julia (a confirmed lesbian) and Luz (who is canonically bisexual) who hit if off when they first meet and Luz wants to avenge her murder.
Love to Hate: All For One is one of the most evil villains in the entire story, being a direct cause to Luz's strife, yet he's incredibly calculating, managing to execute his plans with swift and utter ease, and a truly intimidating villain who intends to Corrupt the Cutie on our protagonist for his own purposes.
Never Live It Down: Camila's drunken verbal abuse towards Luz where she wishes death on her own child and hates her while throwing awing glass at luz when she dares to call her out on her drunken behavior in the Chapter 2 rewrite paints her as an abusive mother and a danger towards Luz, despite the author claiming this is the first time Camila has done something violent when drunk. Many still claim this is extremely dismissive of any kids with bad home lives and is one of the main reasons the rewrite for All For Luz is a Broken Base among readers.
Paranoia Fuel: Living inside her head, All For One is aware of everything Luz does, meaning she has no real privacy from the monstrous supervillain.
Realism-Induced Horror: This is the reason why Tyler Wittebane, and by extension, the extremist right-wing values he holds steadfast to, are so horrifying. In stark contrast to All For One'sCard-Carrying Villain schtick too unlikely to be encountered in real life, Wittebane's bigotry, manipulation, position of power, hypocrisy, and persistent belief that he's always in the right is chillingly realistic. Many people like Tyler Wittebane exist in real life, and not even his own family is exempt from their prejudice. Not to mention, history has many, many examples of discrimination against minority groups like LGBT and non-whites, ranging from "mere" prejudice to outright genocide, abusing freedom of speech to do so without legal consequences.
Superpowers aside, being the victim of bigotry and hate crimes, instigated by people like the Wittebane Church are something to be legitimately concerned about. The story shows in many cases that people will take extreme measures to deal with what they believe is a problem and how even a child can be a victim of it. Just ask former victims and their family members.
Squick: The graphic descriptions of Luz's injuries can fall under this territory. As well as some of her more brutal kills, too.
More than a few readers feel this way about Julia Wittebane, Luz's First Friend, being essentially Stuffed into the Fridge when she had a bit of interesting characterisation. The potential of her deciding to take her power back, stand up to her parents, getting in a Love Triangle with Luz and Amity, and her exploring her connection to Emperor Belos in the Boiling Isles. All would've been interesting in the story. Although this seems to be getting subverted, as her vestige has gained sentience in Luz's Mental World.
It would've been interesting for Camila to go to the Boiling Isles along with Luz, acting as her Morality Chain that hinders All For One's Evil Plan to Corrupt the Cutie. Instead she is Killed Off for Real halfway through the second season. It also would have been interesting for her to come back as a vestige in Luz's Mental World, had Luz managed to take her "Repair" Quirk back from her corpse and confront All For One.
Riley, Luz's cousin, becomes a Regretful Traitor due to her attempted assassination on her cousin Luz. It would've been interesting to see her to become The Atoner, protecting her Aunt Camila and possibly performing a Heroic Sacrifice for her Redemption Quest. Instead she is unceremoniously Killed Off for Real at Luz's hands in a fit of rage for her betrayal. Its also unlikely she'll come back as a vestige in Luz's Mental World either.
More than a few readers wanted Millie Ravenclaw, an actual competent member of The Emperor's Coven, to survive the Battle of Gravesfield to the point of the Day of Unity, feeling that Droped A Bridge On Him was at play here.
