I've played plenty of games that have full set armor bonuses. Or partial set bonuses. In my opinion I think they should. And I think the full set armor bonus should mimic some of the exotic perks. Simply because I basically have to destroy my look if I want an exotic perk. Maybe make a set, get an additional grenade so it's like you're wearing armemantarium with having to wear armemantarium. You won't get the 'heavy' or 'special' ammo perks. But it'd be nice.