Then why was she banned? also, why is ST Akuma banned for that matter when he has completely dominates certain characters because of his Air fireball?
MK( could not handle Skarlets daggers like ST couldn't handle Akuma's fireballs
ST Akuma is banned for more than just the air fireball, though that is the most obvious problem he has. The real issue is
not that ST Akuma is better than most characters, but that he is better than
ALL characters,
ALL the time.
Here is a partial list of abilities that ST Akuma has:
Air fireball -
The game was not meant to be able to handle this move. This move alone prevents about half of the characters from doing anything at all. The ones that can sometimes get past it are still at a huge disadvantage because of the amount of space it controls.
His ducking kicks have invulnerable legs
He cannot be dizzed
His hurricane kick is invulnerable until it has the ability to hit something, and can combo/juggle into into itself
He can use red fireballs to keep you in blockstun the entire match
His teleport is invulnerable
The list goes on.
ST Akuma is banned because he breaks the game. It would be like playing MK with a version of Scorpion that has ten times normal hitpoints, unlimited super meter, and can combo spears into more spears, forever. Akuma is worse than that, even.
Comparing pre-patch Skarlet to ST Akuma is comparing apples to battleships. She needed a little work, but there were plenty of characters that could deal with her. For example, Smoke could shut down her dagger game totally.
(note: he is only soft banned in Japan)