I'm okay with a more brutal Natasha if it makes sense for the character. I can totally see her going full out to save the lives of children being used for dark web smut films. But what worries me from reading the interviews, is it seems like the writers are mistaking 616 Natasha's moral code, mercy, and belief in redemption for MCU Natasha's remorsefulness and guilt, and in an attempt to do a 180 from Whedon's Natasha they're going to run right over 616 Natasha's characterization.