I have forayed into Skarlet before. In my opinion, she has the best "parry armour" in the game, as it just about beats any attack/wake up option with the exception of some of Kenshi's armoured moves. It is very fast and she can do it almost from full screen.
Dagger cancels from full to midscreen are like CSZ or Cyrax bombs, it's done to make you react and/or to get her to close distance. The dagger is like a long range poke.
I can't remember but some of her strings have gaps which should be enough to d1 or even spin out of.
She is best when she has armour and tragically, she usually always has armour due to her insane pressure. She's better than Baraka up close, does more damage and even builds meter better than him.
Her down and up slash, normal and ex can be punished on block. I think only her red dash slide is safe on block. It might not look it, but her teleport can also be punished on block.
Now, I know that she has a bit of a "wonky" hit box on her red slide, for instance, CSZ can ice parry that, even though it's supposedly a low hitting move. I would assume that Baraka could spin that. I think his spin would beat any of her red dash attacks, as long as they are not armoured.
She's quite tall in this game so I think her hitbox is pretty big, BUT she can make herself very small with d3.
She has no low starters. If you're that worried about the red dash, take a knock down rather than a launcher.
Zoidberg, I havent played her in a while, but we could do some casuals soon if you want to play Baraka vs Skarlet? I'll get the muscle memory going again with her. We can work out what works and what doesn't.