As for that crazy AI, i think the programmers coded the NPC's to deal with human players as if they were "heroes" even if they are only simple troopers. That's why they will shoot at you no matter what.
Bloody annoying if you ask me. The main theme of battlefront *should* be to be just a regular joe on the frontlines, no more important or special as anyone else. And this new AI just makes it a worst experience.
I refuse to answer that question on the grounds that I don't know the answer.