There's no way to do a "neutral" Talia. For one thing, neutral in relation to what? But, more concretely, her turn with LexCorp, like all of her jetsetting, is rooted firmly in blood money and crime. She's rich because of crime, because of cruelty and abuse, murder, slavery, and terrorism.
A lifetime terrorist, murderer, and crime boss can't become "neutral" by just not actively demanding murders for awhile. She's still just as guilty of all her crimes even if she took a hard turn and went straight.