I was just reading a small piece about a letter sent by a Roman Military Doctor to his parents, apart from combat casualties he makes particular mention of "combat fatigue" whilst dealing with the wounded (p53 of the Osprey Imperial Legionary 161-284). The biggest factor in the actuallity of combat at this time would be that the battlefield was not "dispersed" as it presently is in response to the lethality of present day weapons,the combat would also be utterly personal-no shooting at a faceless blob from half a mile away,(stressful enough but in a very different way).
So,if you were on active duty you might well see a lot of close up violent death .I suggest that nowadays the general population consider death to be a remote and calamitous thing that happens as some sort of terrible mistake. We know that rural recruits were often considered better material for soldiering being accustomed to hard outdoor work, I would also suggest that unlike today most of these people would have killed animals for food (most people now have never even skinned a rabbit) and seen death often in daily life and lives frequently curtailed (chilbirth in particular). So id suggest that perhaps death would be no more welcome then as now but it would be understood to be immanent and not a cruel accident of nature.
We know that medical care in the Legions was often much better than for the plebians and food supply was more asured,if I remember rightly life expectancy was also longer for retired soldiers than normal civilians.
I suggest then that things might look brutal through modern eyes but perhaps what we consider brutal would be considered to be the reality of life. I just wonder what modern media coverage of endless disasters and wars does to a civilian population who in the past would hear about earthquakes perhaps a year or two after the event.
Wandered off a little there but any thoughts?