All joking aside Destiny does not need dedicated servers. P2P can work just fine when it's done properly. Warframe for example has ACTIVE connection managed P2P, meaning when you join a matchmade group or when your pre made group starts an activity the clever coding DE put in place rearranges the group into the most efficient use of bandwidth it can. I have almost never had lag issues with it. Sure there are occasionally issues where the group is rearranged due to a member leaving partway through an activity but it is 100% better than the mess Bungie makes.