the reasons are simple:

1: i want to make the story faithful to my own headcanon of Undertale

2: i want to be more creative with characters, locations and ect.

3: Ingrid does not fucking die from Axis..i mean yeah, she and Stacy will die at some point in the game for obvious reasons but in another way that i can't tell until the full game releases

hope ya'll understand and don't start asking me if Axis will kill Ingrid