So? Glowy on the hands has equaled repulsor or flamethrower on almost every armor since the 60s. Besides looking stupid, putting it behind the joint of the wrist at all, and especially on the back, makes it nigh-impossible to actually aim. And if the glowy this time isn't the actual repulsor, but some kind of power source for some kind of other palm weapon, then it still makes no sense, because such a huge power cell in such an unwieldy spot is just asking for it to get smashed and become useless, even discounting how much the rest of the arms' design would have to be altered to compensate for the extra weight on both wrists. Even if this is a new armor, the design is just stupid on any actual-use level.