Partly Jean has nothing outside the green dress that is hits all 3 notes - uniquely hers, iconic, and not Phoenix related. So any attempt to call back to well known costumes is either the green dress or her 90's suit. And most people seem to dislike her 90's suit. Scott's suit is a hybrid of his Bendis suit with his iconic color and visor changing it (almost a hybrid of Revolution/Astonishing with 90's colors), and Wolverine's looks like his standard for the most part as well.