Those abilities from the article are useless for a soldier.

You don’t feel much stress shooting the enemy. You feel a lot of stress when the enemy shoots back, especially the artillery. So you get less stress when your artillery has more range, because you don’t get shot at.

Using painkillers is just ignoring the problems with your health. If you want to stay in the army for more than a year, go to the doctor and get a proper treatment.

The food is not a problem, we got ten thousand variations of canned meat.

The most pressing problem that soldiers is the lack of hygiene. If you can shower once per month without getting sick, you’ll make a better soldier.

It’d also help if you’re short and can carry heavy stuff.

So, I imagine actual super-soldiers to be muscly gypsy dwarves who eat a lot and complain when they get health issues.

Source: has been in the army.