Nitti's actually right. KF is not in the same boat as say, Raven or Flash, who can seriously outstrip DS on a bad read at a distance, or even really do a devastating punish on low shots. She's stuck to the ground, and the only real special thing she can do in the air is airdash. She has to contend with DS on the ground, and almost anything she does is going to get her shot with quick fire. Even if she punishes low shots on a bad read, she only gets an EX iceberg into another iceberg at most. It stinks, but it's not that much damage and it does not earn her position. Meanwhile, DS has answers to her close up bullshit, and her good option for dealing with oki can be made to whiff if not brutally punished. She's vulnerable to reaction stroke tactics and she has to take risks to run her game against DS. Having a low shot punish is a boon for her, but it's mostly obnoxious rather than deciding the match.