Fair enough regarding Common Lore, you have done a good job so far so I'll withhold judgement until I actually see your write-up
I still feel weird about having such rare knowledge as Daemons and Xenos in the same skill, but to be perfectly honest I had completely forgotten about the Specialist Knowledge talent. I guess it's just a matter of wrapping my head around a different way of handling things.
Paranoia seems like a "healthy" thing for Acolytes to develop over the course of their service. You could also have a trauma involving various psychogenic movement disorders (shakes, tremors, spasms, speech disorders...)
Side note: Out of Ammo-Despairs does not have to be in combat, a GM once had my character run out when I rolled a Despair on a Fear check. The group was exploring an abandoned space station and we had to make a Fear check due to the spooky atmosphere, I rolled a Despair and the GM basically said my character had a "Predator-moment", firing blindly at nothing until the weapon was empty. Got some weird looks from the rest of the party after that