yep ....
When Skarlet was announced, people said : "wtf .... what dumb character, her looks seems boring and dumb .... NRS is taking a spot in MK9 to put this shitty character, blablabla ...." .... with time and patient, people recognize her as a good character and tournament viable .... and accepted her for what she is ....
Killer Frost ? Damn, when people discover that her was part of the initial roster, the comments were like "what the hell NRS put this unknown bitch in this game ? Who is KF ? Man, her looks stupid and totally worthless ...." Now, after IGAU came out, you can see her design is cool, ger gameplay is deadly, and she is an OK character ....
So, Batgirl is just another addition to the chars roster, and so, since if her moveset is unique, and nothing as or like a copycat clone from Batman, people should judge only after picking her, using , testing her gameplay, and see if she is good as "competitive character" or not ..... matter much more if she is good to compete in this game, than if she is another batman character ....