Personality changes between writers is fine and even good for what works with the writer as long as the core of the character and what motivates her and drives her is consistent. When what motivates Lorna and her belief system is suddenly completely changed that is a real problem as one is effectively writing another character that looks like her.
Duggan’s urban princess Lorna’s personally has a basis in past writing namely some of her depictions after the genocide of Genosha while being very much it’s own thing.
Russell Dauterman art