Comics today have really given the women who fill the pages bodies of women all men want. More often than not the women are well endowed and are super model sexy. Heroes and Villains like Harley Quinn, Emma Frost, and Poison Ivy have always been in a more skin than material costume.
Obviously there are some super-heroines that are in decent costumes (like the women above) but are still well endowed. So why are they so good looking? Well it's the appeal. And as much as women might hate it, it sells more comics. If a guy were to pick up a comic book (let's be honest, more guys than girls read comics) and see an attractive woman on the front, they are more likely to buy it. Then there are costumes like below.
Black Cat is an ally/lover/cat burglar to Spider-Man (literally though, she hates Peter Parker and loves the hero). Always in an outfit showing more cleavage than most women in comics, she has made a name for herself for being the sexy gold digger (she goes where the money is).
So should women in comics dress more appropriately? Or should they keep their current costumes? I personally as a guy, think that they are a little skimpy but I'm not complaining (I mean some comic book characters are very attractive. Is that weird?). Now there is also another side to this argument. The side that says "These costumes girls wear are pointless."
This is only one of many of her costumes. Recently she just changed to a more practical costume that doesn't show as much. This costume just seems impractical and useless, she might as well just be naked with boots on (the reason why the artists changed her costume). This is not a good direction for women in comics for sure. Women in comics, in my POV, should be hot yet in decent costumes that can show a little bit of skin but for the most part should be used just for being a hero. Now there are some good reasons for having some skin or cleavage showing for the super-heroines. Like how they are overlooked for being a woman, since most of the men in comics like Captain America and Iron Man take the spotlight, women need a way to grab some attention. Whether that be with their skills or their costumes it's up to the writers.
Wanda has been in some pretty skimpy costumes over the years, this one being one of the worst. She is a good example for what I am trying to get across here. Though she is powerful (she is the reason the Avengers disassembled once), she is still overlooked. Now I don't know if that is because she is a woman or if it's because people just don't know her well enough (they will after Age of Ultron). Why do you think Marvel is so worried about a woman lead?