Helmet perks?

Should helmets just be cosmetic or shoukd they have perks? I think they should. Could be used to give more identity to various armours. Stuff like the polar patriot had no unique armor perk. But give their helmets snow vision. Reduces effectvof blizzards on visability. Boom. They become a staple on snow planets. Could have stuff like reduce camera shake for very padded helmets. Or you can see your ammo count with the suege ready helmet. Various scout helmets could have enemy highlighting or the loot pods giving a visable ping on the screen even through terrain so you can find them in deep jungle maps. And of course night vision or heat vision. Medic armour shows actual stims left of allies instead of white/red. Engineer shows the arc of your throws. I could probably go on.