I see three wearing the same armor as Bacarra in that picture. I noticed that when I watched Sith the second time. I think that it is possible that armor is used for officers, as big of a tactical error as that is...but hell they did it in AOTC as well. It is possible that theyu are like the equivalent of Airborne Troopers in cold weather gear too. Though you can't take anything in Battlefront as canon, and often you just have to completely ignore it, the heavy weapons troopers did wear the same type of armor as Bacarra as well.