Make a full armor set usefull!

I think having 4 separate armor slots makes the game more confusing. I see all of these armor types that all do the exact same thing. I think that completing an armor set (getting the helmet, chestplate, leggings, and boots) should give you something. Whether it be an extra buff, or enhancing the armors existing buffs, it should do something other than look cool. Right now, it feels like the stats are the only thing that matter but I can just reroll them. Please add something like this to the game.