Honestly as someone who thinks the MC is fine as she is, I don't think the "complainers" should be labelled as selfish simply because they were expressing their opinions and suggestions (unless they were being rude). Liking a more submissive MC does not mean that they only ever like passive Mary Sue characters. These opinions would help the game and P1NK-ANG3L grow!
And as the creator it is completely fine if she decides that she wants the MC to stay the same, because it is her game and she has the right to decide how she wants the game to turn out. A malleable MC would mean better immersion for many people, but the game will forever be amazing, whether or not the MC has a malleable personality. NOTHING would change that.
I just hope that people don't get discouraged to express their opinions on the game just because they'd get reprimanded for it. We're all fans, just with different yums. No war, no shaming, only Jayce and P1NK-ANG3L supremacy <3