[spoiler] For Lucia, I think also it was a good idea to introduce Chihaya and her in the story. It will seem less strange later when the five heroines meet Touka during the end of world. Like they are in the surroundings.
But, in the VN, my speculation was that Lucia has been made a part of “New Humanity” Project but the laboratory was destroyed during the Salvation before Lucia obtains her powers.
An useless hypothesis here, this would be weird if Touka is alright with the experiment, despite her weight for Lucia and leaves her in an orphanage after that. Even if it isn’t impossible.
For another point, they didn’t seem to have indroduce children in the Chorus, only the caretaker. It is consistent with their changes in Rewrite +. [/spoiler]
Otherwise, I found they have well shown the ruthless side of Kotarou. I didn’t expect him to hurt Esaka when he is immobilized. It was more brutal than in the game and I imagined the kidnapping of Suzaki much more…amazing… than simply an ambush with trucks.