I would suggest that a damage nerf on all fronts is necessary. I'm not talking nerf 50% of her damage, but she's the fastest character in the game, she doesn't need half life damage off of juggles.
Her throws, namely the one that takes half health, needs to be slowed down with evasive properties removed. Tone down the damage by 5-10%. The catch throw needs to be reworked to follow the basic rules of the game. As it is, it catches people damn near out of the air.
Even if her moves didn't all re-track, she'd still be too fast for the side stepping system. I'm not sure how to work around that, maybe somebody else can shed some light. Damn near infinite, unstoppable strings need to go.
Stuns, guard breaks.... again, STAHP. Give her something, or hell, let her keep something... but not as much as she has now.