I don't get why she has to answer for stuff...no one can really make her answer for what she did..it can be a situation where Kang or Doom have them...
Evil? I saw it as the book influenced and amped up her desires and impulses. Yeah she took it VERY FAR but when push came to shove, she still allowed...
The heroic at the end just retraced WV when she let everyone go. She sacrifices herself. She doesn't really face what she did and try to correct it....