I'm not particularly invested in this topic,not in one sense nor the other.
That said, let's point that people keep mixing different arguments.
While there are reasonable discussions to be made about good and terrible armor design, let's stress that any bitching about the "impracticality" is pointless and stupid to make unless the realism in a central point of the setting.
Bikini armors aren't a clever or cool design, but I'm fairly confident no one but a sparse minority of lunatics even gives a shit about their realism, because the general ideal, like with Berserkers and Barbarians fighting basically naked and cool ladies with battling in high heels, was to appeal to the "rule of cool", not to be realistic. Not to mention that at this point in time is basically a battle against a fictional enemy, since no one is even doing that shit anymore.
As we are on topic, I'll also take my chance to add my own bitching against something just as UGLY as bikini armors. In fact far far worse, because not even "cool", "sexy" or "hot": giant fucking pauldrons.
Please, le'ts make the world a better place: let's all sign a petition to get rid of these goddamn abominations.
Rule of cool all the way!