Well, good job trusting people's opinion who do not actually play a character lol
She was too good, now she's just shit. I refuse to play this game anymore XD
Sub-Zero is still a very good character with space control, defensive options and footsies stronger than the mid tier low end characters. Killer Frost went from trait cancel pressure with air dash broken Top 5 whatever into mid tier no footsies just yolo slide with clunky short stubby normals even prior to that she had no air control, get bullied by interactables and didn't have fast jump normals to win air to airs. KF went from Top to Mid.