The entire final battle is one redux of the 9th Angel fight: Asuka being trapped inside a possessed Evangelion with dark colors and four arms because of the 9th Angel, and Shinji is the only one that can save her with his Unit 01, he's even wearing his old 01 plugsuit which he wore last time against the 9th Angel, and at the end of the battle Asuka is given the body she would have had had she not been infected by the Angel and cursed by Evangelion. This entire fight was the universe letting Shinji undo his past mistake. (and the following scene to have him undo all of his mistakes and then more...)
Kendrix wrote:It's kinda interesting how different Kaji's & Misato's reactions were to losing Shinji.
Kaji goes & dotes on some other kid (at least in the Manga verse you could see his tendency to mentor random orphans 'atoning' for what happened to his little brother), whereas Misato decides that she's through with this whole parenting thing & utterly incapable of it - maybe she feared that she was gonna get Ryoji jr. killed just like what happened with Shinji.
Personally I think that while N3I hit her hard, the real catalyst to her change of personality was losing Kaji and see the world destroyed by A3I.