Destiny is to casual for world bosses. Patrol is pointless, and would require a complete overhaul to make it relevant. You want epic world boss battles? Go play Borderlands :) How would they reward you for beating a world boss? Engrams? Materials? There is no inventory space for that. Make it relevant drops and people will farm them and say F.U. to a large portion of the current content. Bungie missed the mark with this game. All you can do is hope they learned their lesson and change the direction of the franchise with future installments. All you will get with Destiny 1.0 is rehashed content packaged in a download, and marketed/sold as an "expansion". I don't think the current game can be expanded much more than its current state.