yes. Thats how RPG's are suppose to be. Unique "set armor" that is equipped together should have a buff of some sort. Lets say you find a full set of crucible armor. It should allow you to gain 10% more XP from turned in bounties, 10% more XP from match wins. Full set of Vanguard armor. 10% more XP from Vanguard bounties 10% more XP from Vanguard activities 2% damage bonus in Vanguard activities when equipping all Vanguard weapons. Set armor is suppose to be unique, rare and hard to find, but high reward. Personally, House of Judgment, The Queen, and Raid set gear should all have a set buff.