Had-to-say wrote...
. Shepard needs to show emotional fatigue for making the hard choices. I would like to see some signs of PTSD.
Remember victory always has a price.
You're the first person to suggest shep show fatigue and signs of PTSD nice job I hadn't considered these two before but they too would add to shep's humanity and make him more real. Like I play the Akuze shep and when I play as her I'm forever terrified of the thresher maws. Other sheps are scared of them too but not as badly as Akuze shep when I've got that one's profile up I'm pressing the gas more and shooting more accurately with her.
Back in Advent Rising your character starts to show fatigue he does too many biotic powers and when alone in a hallway nearly falls over you see something is not right with him I wondered if all the biotic use could kill him later in the series but as well all know no second series was done. I'm equally as curious with shep will all the beacon and reaper exposure kill him? I love to see him weakened by the beacons in ME he recovers quickly but in Arrival it takes longer to me it's a sign his body isn't cooping so well and I'd like to see more times like this maybe we come into contact with uber super mother beacons that shep interfaces with and is not only temporarily blinded by the endeavor he can't walk hardly speak and must be escorted to the ship and medbay so now his team mates must protect shep who can't fight and can't order them around.
If I was given the choice in game to have to stop interacting with the beacons or shep will more then surly die because of the strain I'd say I'm still going to interact with them the need to know whats inside them is too strong.