In the shadows I wait, not commenting. But I too am watching this project and admiring the dedication and visual clarity. Nice nod with the Marathon mug in one of the latest pictures. I have not played Halo, so I don't have much to say as far as accuracy.
I will mention that with everything else being so good, the technicians holding their pistol out in front of them while they stare at consoles stick out. The man with the hands behind him while console viewing is loads better. I don't know if you are against using Lua, but you could check if the "hands-behind guy" is active, and then swap it with a pistol toting guy on the fly, for combat situations. Let me know if you need some code to do that.