Jer
I'm a literal Sloth
Preach friend. Shinnok MU is tough but not impossible. It's probably one of her only losing MU's that I can say for sure.You can beat good shinnoks, its just not nearly as easy as say beating anyone else. If she had a winning MU against everyone she would be NERFED TO THE GROUND. Either pick Hollywood which is top 3 or 4, spec ops with is arguably top 10, or make brawler work like dab. Or you can find an alt for shinnok.
Also something I find interesting. I think Cassie without a variation is still top 5 possible. I know you have Hollywood at 3/4, I have spec ops at the same spot.