the breasts on the female valks in m7 dont bother me as much as other designs. Along with Transformers, GiJoe, Voltron and Robotech, I grew up watching Tranzor Z and Go Nagai and plenty of robots with breasts in that anime.
Minerva X
Dianan
Aphrodai
they all had boobs and fired rockets out of them.
I dont like the Valks with faces, but there others that get to me more than those.