@Louis Rovegno: Well, when you create a culture that fears sex, it's inevitable that it gets reduced to an object, and any object has the potential of sexualization.
OR the juxtaposition between attractive human anatomy and repulsive non-human anatomy is entirely intentional because Xcom aliens are supposed to be scary and unsettling.
You're weirded out by the snek ladies and that's exactly what the designers were going for.
Also, isn't it just as possible that they saw the concept art, realized the Rule 34 implications, and simply made her hideous as a deterrent/acknowledgement they're afraid of sex?
Meanwhile, in the Avenger Bar:
"You seen the ADVENT NEWS from today"
"Nope, let me have it"
...
"We have never ever seen that guy"
*removes memorial entry*
Well part of the point of the character is to show how there's some human dna inside the creature along with the alien dna it started with. They COULD have gone with a snake with a dick or an enormous codpiece but that probably wouldn't have got past the sensor :P
I checked the new Chryssalids in X-COM2. Well they haven't lost there touch: They got dodge, got burrow and are insanely fast now... still, even how badly the dude handled them, his team still managed to wipe them out with plasma weaponry at that point. I guess the new threat is their numbers.
According to the game, the "snake lady" (I call her like that..) is an evolved version from the GMAN in xcom enemy unknown. That's probably why they look like a living trap.