I don't really like the costume either, but to be honest since her 90's purple costumes (skillfully penciled by Ian Churchill back then) I found nearly all of Domino's costumes have been very boring, with the exception of her current one with the green and white touch which is quite refreshing compare to the all black/commando style costumes she was wearing since more than a decade.
Regarding her hairstyle it is clearly not her most common hair length, we definitely need a long hair variant, so I really hope Domino PF will be more of a Black Widow PF rather than a Mystique PF....