This is a thing in other mmo style games. Diablo 3 is one that I know does it well. Honestly it has to give a more exotic styled perk to add customization configuration. Mainly cause you need to use no exotics. In the current state, the need for full set is merely for vanity whereas perks and stats are far more important than looking cool in your full set gear. Although the new artifacts seems to be heading down the path that the full gear set should have taken.