Definitely agree with that part.He can have sympathetic motives but the actions and crimes he regularly commits are not in any way heroic
Also agree.With out the Nora back story ( Which gets old very fast) Mr. Freeze just becomes another low rate villain with a cheesy gimmick. To me Mr. Freeze was a good one or two shot villain but should have never tried to work long term in the Batman History.
Is this story arc before or after he does horrible things? Because if after I could see a woman (not Nora, in particular, as she's sort of a blank slate) leaving him after learning what he did, regardless of motivation. Frankly, I could very much see Freeze obsessed and violent with her after she left, too. Or depressed an suicidal - either could happen.Freeze only needs to appear in one story arc that explains his situation, then Batman and Bruce Wayne solve it, so the next time he appears, he's an ally. Done.