Well even with all these new revelations about her past from so many writers (Fraction, Williams, Duggan) etc I don't think anybody actually thinks she was "good all along." You can't reconcile that with the things she's actually done. I think they are all just trying to make her crimes a bit softer because anyone who read Xmen, New Warriors, New Mutants, and the Firestar mini back in the day would not come away thinking the character was good at all. New Mutants was the softest Emma you saw in that time period until Gen X and even in New Mutants she was quite harsh and cruel.
But again, I am going to repeat what I said before. All this cleaning up isn't necessary. The character changed for the better so anytime these new things come to light trying to somewhat absolve her of blame just makes me roll my eyes.