For the sake of saving variety, which we now have some semblance of it in the game; Set bonuses should only be implemented if we get vanity/cosmetic/transmog system. This way set bonus can be obtained, but still allow us to customize our guardians. An example off the top of my head, is if anyone has played SWTOR. In the beginning all the end game gear looked the same and thus, dull and boring. Gear in that game had components. What they did to fix it, was be able to attach the "set bonus" perk to the component, and then allow players to remove it from the "end game gear" and add it to the custom gear.