How in the hell is the female half-plate a '' metal bra ''?
The only metal in the design is holding the breasts.
The Half-Plate is supposed to be a breastplate plus roughly half the additional protection of a Full Llate set. The design as is is less metal than the Breastplate.
The description of Half-Plate in the Player's Handbook is as follows:
So it should be "no cuisses" and "no sabatons". Poleyns (knee protection), however, should be included - it is the first thing to protect in any leg armor, even padded armor should have them.