Cartoonist Kate Beaton, in her always insightful webcomic Hark, a Vagrant, recently published a page of comics about Marvel's Cloak and Dagger, and specifically about the obvious problems with the dagger-shaped cut-out in Dagger's costume. You should read the whole thing, much of which we can't post here because of the cartoon nipples.
Obviously Dagger's look is coming under increased scrutiny because a Cloak and Dagger television series is on its way to the Freeform Network. It says a lot about the weird standards of superhero comics that we don't even have to wonder if Dagger will be dressed similarly on television; there's simply no way the TV show will use the same costume. A plunging dagger-shaped cut-out that reveals cleavage and navel simply isn't something a television superhero might wear. But in comics, it's a costume that can last for thirty years.