Writers create original characters to use in their comic book runs all the time and only a tiny fraction of them leaves such a mark that other writers think about using them after the author leaves the book. Grace Choi is simply not part of this fraction. That was to be expected, since Winick is not a big name in comics (in fact, people mostly remember his worst books and ideas) and Grace wasn't really that memorable as the Outsiders' "strong brawler teammate" figure (X-Factor's Strong Guy she was not).