Honestly? No, I wouldn't change a chapter if I really believed that was the direction the story needed to take. I've upset readers before, and I'm sure I'll do it again. I understand that in fan fiction, their perception of a character may differ greatly from mine, but if I've taken that character to a certain point, I can't back off and wave a magic wand, and make it all better.
I love my readers, and I value their input. Ultimately, however, it's my story to tell, and I have to tell it the way that feels right to me.