As an officer in my guild, I'm not overly concerned with my feral OT getting extra set pieces to round out his healing or nuking builds. Our hybrids do flow back and forth sometimes, but most enjoy playing one role above others. I see no reason to balance drop rates so that the hybrid classes can finish 3 sets by the time focused DPS classes can finish 1. While backup gear is somewhat more useful than a shard or gear for an alt, it's not that important.