I think the intentional vagueries (vagueities?) exist not so much to refrain from addressing issues such as this, but to allow players the freedom to come up with their own interpretations and thus "change" the fluff. I didn't mean official declarations of fluff change as much as when it becomes player-property it inherently warps and absorbs those ideas and a "new" conclusion is reached.
I didn't know that older versions had more female minis! That blows my mind. I attribute that solely to Ripley.