Technically? I guess you missed my point. Throughout the years deadpool has changed in shape a lot. From roided 90s (sometimes too serious) deadpool, to skinny only comic relief and everywhere in between. In the suit, literally any male would look like deadpool. Without, anyone with Freddie Kruger makeup would look like him. If you're talking about Wade Wilson, again pretty much any generic white dude would work.
My point being, physical appearance, anyone can look like deadpool so the personality is what mattered, and Ryan Reynolds was cosmically perfect for that.
Similarly, physically, no one looks like domino so anyone will work. What matters most is personality. In that department, I think Zazie is a stunning pick.
Domino cosplay is just fit people with white paint and a black spot. Maybe I should clarify. I'm saying "human" domino because domino is such an alien looking character. If you did her exactly like the comics, it would probably really clash with the style the deadpool movie went for. Citing cosplayers points out the concept that anyone with enough props, makeup, and level of physical fitness can look like any comicbook character.
No one naturally looks like domino.
I believe the dalmatian style of the character may be too outlandish for the movie.
So personality trumps appearance, which it looks like Zazie won out.
Maybe I'm only dying on this hill because I am an actual fan of domino. For me it's never been about the look (though I did always love the pixie cut because of the personality match and my personal preferences). She has an awesome (though often nerfed) powerset and killer personality. Appearance for me is fine if it's just symbolic. What I want them to nail is the character, and with what they did in the first movie, I think they'll do the character justice.
Edit: On a similar note, did anyone care about Morena Baccarin not looking like this?
If costume distracts from character then it should probably be toned down then no?
