This is generally the case with TFA.EDIT - Makes me wonder if there was too much focus on Form over Function here?
I build stuff with Lego. One of the side-effects is that I look at things from a perspective of "what's holding this together behind the shell". Check out how they've removed the armour systems on the back of the new trooper armour. The surface details are still there but there's no way they fit anything behind them.
Those chunky pieces on the back of ST armour sure would have made it uncomfortable to sit in a seat or ride in most vehicles. Maybe the new stuff is designed with that in mind, and either dispensed with the old (whatever was under that protruding box thing) or integrated it into the armour more fully and without the pressumed need for maintenance or access. Or the designers of the new suits wanted to make them 'modern' without regard for utility. It could go either way.
Do we even know what that 'backpack' on the armour was for anyway? We never see hoses connected to it or anything that looks like it fits it in any way. Did the STs on Tatooine with the big honking back packs use the armour 'backpack' as a connection point? What about the 'space troopers' outside the docking bay on the first DS, was their external backpack connected to armour using the protrusion 'box' as well?
I can't recall if we ever saw a stormtrooper just sitting around in the OT.
