So, do we know where the mud troopers fit in the military structure of the "new Disney cannon"? By old EU standards, they'd definitely be one of the first Imperial Army infantry that we've seen on screen (besides black clad officers, and the occasional Walker pilot), since Han definitely didn't go through the storm trooper academy before being assigned as a mud trooper, and the fact they're being used as imperial cannon fodder, not as elite troops like stormies "would be". But the whole "Storm troopers are a separate branch of elite soldiers" thing is never brought up in any of the films, so is that gone, and storm troopers are now just "imperial infantry" also?
Be a shame if they were, I kind of like the direction they're going where that armored torso, and flared helmet would be the marks of Imperial Army infantry, where as the full body armor with the "skull faced" helmets would be the hallmark or the Imperial storm troopers.