See, this works for the most part
This. No boobsock necessary.
Even the boob shelf is unnecessary. Most modern day armor is built for unisex fit, as boobs squish. They don't need that seat, as the wearer of the armor would no doubt be wearing some kind of support underneath it (you really don't want to wear armor without a lining or body sock of some type).
Armor is to protect your vital bits, and the bulk of the armor should be dedicated to doing just that. When boobsocks are added to armor, it limits the bulk and shielding that you could put in the armor, as it needs to make room for that protrusion.
Us women know our boobs squish. So, support them, bind them, and stuff them into good protective armor that protects without needlessly accentuating them.
This has been a public service announcement from someone who follows Escher Girls a bit too much.