I am going to be a little hypocritical here (I am still a fan of the classic outfit), but since they wanted to make the DC reboot heroes wear more up-to-date and practical outfits, the new Wonder Woman outfit is a definitely a fail.
You can see her new costume here [link]
While I don't entirely hate the Wonder Woman costume for the DC reboot - I don't mind the pants - I do dislike how inconsistent they are with the designs. C'mon, they even gave the invincible Superman armor and they still give her a bodice for her breasts to pop out of?
Diana should look like a greek warrior - and warriors do not "pop out" when held upside down.
I also hated the tiny tiara, collar and bracelets. I was "this close" to giving her himantes to protect her fists when fighting... but settled on just making her braces bigger to deflect bullets.
The leather straps were also added to make her look more like a warrior.
I even kept her in matching style with the rest of the team and gave her a high collar.