I've seen lots of exos in the tower with serving jobs like being a post person, cleaning, or being a guide.
I feel like this is the proper role for all exos as I don't think they are very adept in combat.
Whenever I see exos in the crucible I feel like I should destroy their ghost as well so I can dismantle the exo and use their parts to upgrade my weapons.
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And this is why exo's are dominating the Crucible. I was anyways. Because we, Exo's, have 25x more strength, stamina, speed, intelligence, and lets not forget: courage! Lol. +1 for the topic