In an interview even he admitted the boob window on the second was maybe a step too far. Obviously the cowl was dropped for the finished film in favour of a domino mask like Robin.
Those who are disappointed by the lack of yellow should check out the 2002 TV series Birds of Prey which sports the exact same costume with yellow highlights and a cowl.
Also Tim Burgard designed this costume that is also super interesting. It looks like he was going for a mix of leather, latex and (possibly) spandex. I particularly love the goggles over the eyes.