Is shooting dudes in the leg the best way to kill? It seems arm, torso, and headshots are kinda crap comparable. Shoot a guy in the leg, and it dramatically increases everyone's else aim, which makes the DPS spike overall. I don't even bother switching from legs atm. I guess I will be known as the leg butcher on the ship.
Yes.
Best defence option is "don the sturdiest armors". Best attack option "shoot a guy in the leg".
Combat is very rich, let me tell you.
I think that's just unfriendly. I feel the need to counter your opinion with the following little account of one particular fight.
I just fought two thugs and one semi-boss in close quarters, all of them at least a level higher.
My shotgun tank with maxed HP and shields up stood in the middle of the room, taking the hits.
I (rifles) and the other guy (melee and shotguns too) were safe in the cover, respectively to two enemies. Only one thug stood behind our backs.
The tank and I maimed everybody in the first round. Somewhat lucky outcome of a, nevertheless, tactical decision.
In the second round, I and that other guy made short work of the first thug in our backs, taking only grazes and one full hit in the process (remember that maiming greatly reduces enemies' hit chances and stacks with the evasion, no matter how poor it is by itself?).
The tank was down to 1/2 HP.
After that, I sent the melee guy to face the semi-boss at melee range. The semi-boss was standing in the cover but unfortunately also positioned in an L corridor with nowhere else to run. Thus, being cornered, maimed, and resorting to imprecise snap-shots, he had a hard time even as a boss.
By that time, the shotgun tank had circumvented the ranged thug hidden behind the crates and started unloading the maiming and staggering shell-shots into him, point-blank (tactical advantage of shotguns).
My 'sniper' self received a great aiming advantage because of that and killed that thug with a fair 71% hit chance, despite him crouching in cover.
By the time the boss probably realized his snap-shots were doing little harm, he switched to his own club and actually landed a lucky critical for 1/2 HP of my melee dude. I admit that that was a rather unpleasant moment.
Nevertheless, he had no chance. From the top, the shotgunner came, my melee landed at least some successful attacks, and my 'sniper self', again receiving severe aiming bonuses, finished the boss with a headshot, despite it being an anti-climactic non-critical
This time, for a change, nobody from my party got incapacitated during the fight; heck, I even had to use a mere 3-5 medkits afterwards. Man, not only was I proud to have solved the situation properly, but it was nothing short of an X-COM 2 worth of tactics and possibilities. And I haven't even used items.