I actually think Post-Traumatic Stress Disorder sounds pretty bad, primarily because it says "disorder," i.e. it's an admittance that something is wrong.
Whereas "Operational Exhaustion" sounds very soft and innocent.
~Oh, that's a good point. Taking the "disorder" out might help the VA in denying treatment for it, and make it seem more like the soldier's fault that they have it.~
~How about "mission resilience depletion"? That makes it seem more like they just forgot to recharge the batteries in their mobile phones. Or "norepinephrine-cortisol disruption syndrome", which makes it sound more like they haven't been taking their pills at the correct dosage.~
Whereas "Operational Exhaustion" sounds very soft and innocent.