It's well known that people will farm dungeons such as Darkmoor or Tartarus for amazing equipment and such. I believe that when equipping the full set of a specific gear, you should receive a stat bonus. As an example, if I was to put on the full offensive suit of Tartarus, I should receive say +30 Critical rate, 5% damage, etc. Just a thought.
I currently rely on my Waterworks hat and robe, but I'd hate for there to be an added bonus for wearing the full set because I need my crafted boots for critical blocking.