I meant it more as an upgrade of suits already in use, but I suppose if you wanna do something more to it, while keeping the "standard trooper" feel, you could pull the armor off and replace it with 400kg of Advanced Armor, which would finally bring it up to the level of toughness that made the classic Elemental so feared.
I wanted to keep this upgrade undeniably better than the original, but not overly expensive. And, being honest, your suggestion sounds more like something for a more elite unit, while this would be showing up in more lower-priority units that nonetheless use Battle Armor.