As a person that is HORRIBLE in the Kabal match up I can say, personally, I found Superman much worse.
Pressure: Kabal.
Zoning: Superman. Dash blocking allows you to close the distance much quicker in MK9 while ducking/getting chipped. A dash is a commitment in IGAU and the walk speed isn't great.
Corner: Superman. Pressure, damage, set ups, all better than Kabal.
Damage: Superman.
Superman is the most complete top tier character NRS has produced recently, he has everything you could possibly want in a character and you don't need heavy execution.
This was an already nerfed Superman
This guy needed work, and that's my entire thing. Some characters need work. Whether buffing or nerfing, some characters need work. To have NRS sit on their hands for 6 months while dealing with any nonsense that could occur is insane.