The character design isn't awful this time but as someone who reads the comics, this would be an E-lister. A character that only super hardcore readers would even have on their mind as I didn't know Deadshot's daughter was even old enough to use a weapon (she's often depicted as much younger).
The point of these Season DLC characters is to elicit hype and excitement for the game. With established IP based games like this, you would want to bring in characters that people want to see, C-listers and up. DeathStroke, Lobo, Captain Cold, Ra's Al Ghul and the like. If it has to be a woman, Cheetah, Talia, Lady-Shiva, Black-Fire, characters who will get a big enough reaction that causes a fomo effect and get others interested through the excitement of those who know who the character is.
With this, you won't get enough people to give a damn about the character to get that kind of reaction. You'll get at most like 10 people who know who she is and those 10 won't get enough people to want to join in. But I mean, the game is already a flop, might as well go out on what you want and not worry about it. Not like the studio will get shut down for it.