ok I don't think this is the place to post this, but it is already going, so here goes.
In this game you have the option of taking all your turns before the enemy does. Thus if one soldier sees an enemy, your entire team can take shots at him, this is unrealistic, but its game dynamics.
Not entirely unrealistic, no. If you walk into a room and it turns out that in every corner there's an alien just waiting for you to appear, well, you're screwed. They're not taking shots at you either, they're shooting simultaneously, it's just a turn based game. Could be implemented differently. IIRC in Laser Squad Nemesis you first give everybody orders, then they're all executed at once.
If you were a soldier in real life, and you encountered an enemy at a range where they could easily see you as well and reactions matter... trying to target any body part in particular is extremely difficult... even for expert marksmen, thus the rule of aiming for center mass taught to all soldiers and police units throughout the world. This is also why armor is used to cover torsos. Your head is a very valuable part of your anatomy... but also makes up about 10% (less actually) of your total body mass.
Completely true. But don't tell me that if you have a pistol and find an alien a square away you're going to shoot at the body. Yes, the body is a better target. But it also guarantees that the alien won't die, then you're screwed next turn.
Sounds good to players... but how would it affect you when the aliens shoot you... you want to let a measly pot shot that normally wouldn't kill you be a head shot for an instant death?
Not a whole lot actually, since even with nanocomposite armor the aliens have single shot instant death weapons. Kerrblade, plasma blade, and the bigger plasma and particle guns. A headshot would have low chances of succeeding at low distances anyway, so I might even get killed less, due to aliens missing more often.
In practical terms, a face to face alien vs me encounter would probably go like this:
Alien's turn: Alien just blasts my head off with a particle weapon instead of using a kerrblade/plasma blade or auto for the same effect. Not a whole lot of difference. I find it that if you're at a few squares of an alien who noticed your presence, the chances of survival are minimal.
My turn: When faced with an alien at a nearby range, having a plasma blaster, and not enough TUs for auto, I'd go for the headshot instead of shooting a plasma ball and possibly killing myself with it (no better choice there, since a single shot won't work for sure).
Not trying to argue
People are strange these days, I
love a good argument. When it's for the purpose of getting something decided and not for just the sake of being contrarian of course.
