That sure doesn't look like the Domino I remember. And the Domino in the comics wasn't much more into grinning than Cable was. You wouldn't catch her sitting around a table good-naturedly grinning like that. Domino was a very specific character and that seems to have been totally lost in the making of this film.
See:
http://comicbookdb.com/graphics/comi...0943_large.jpg
That's the wrap-around cover for Cable issue 25. Domino is right in the middle there, next to Cable. She's next to the words "Special X-Men Anniversary issue", down low.