I would enjoy Destiny more, I believe, if the confirmed factions were all NPC groups. Meanwhile, the community has the freedom to establish, manage, or join player-made factions. This way, we all get something else to name and control (That's always fun, right?). Of course, no single person is obligated to take part in said activities.
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Maybe if you could make a cell in the big faction you joined. Like Fireteams.