Maybe metal armors (metal armor, power armor) coud be improved with polishing, increasing their laser reflective abilities increasing resistance against energy weapons.
And other non power armor could maybe improved with armor sheets that gives extra protection against normal damage, maybe two types of sheets(other adds damage resistance and other damage threshold.)
And ofcourse the ultimate armor, power armor should have some nightvision kit, dehydration recycler(recycles the sweat and pee) making the player dehydrating much slower rate(maybe 25-50% slower rate), and maybe some power hydralic legs, what would allows player to jump much higher than normally.
And maybe power armor could have a pink paint kit, that would colour the PA to pink and would give boost to speech skill check against women.