I'm surprised she wasn't classified as S tier earlier, to be honest. Great mixup, great neutral space control, great okizeme off of pretty much any confirm, huge damage in the corner off of her great mixup and okizeme.
The only really glaring fault is that she doesn't have a meterless reversal, which makes her have to rely on barrier mechanics, counter assaults and instant blocks to get out of pressure properly. But her meter gain is pretty good so you're usually walking around with 50 heat or so to spare, anyway.
Also her good matchups with some of the other S tier characters really help.