Kitana should be higher or equal with somebody above her in my recent experience. She can mix it up and keep you locked down very well. Try to pressure her and you could get a kick AND an instant fan in the face.
Not sure why mileena is near the very bottom, I am guessing there is some huge flaw that I don't know or can't remember.
I am not asking that this tier list be changed, just thought I would share my opinion of it.