I loved the Faction Rallies back in D1, but sadly they haven't been so much in D2. I think that when it comes to the Faction Rallies it should be lasting for 2 weeks every 4th Season (like an presidental election) and you can only join one of the factions and the faction that gets the most points by (Most Members/Most Engrams/Most Strikes/Most PVP Matches/Most Bounties/Most Pub. Events/Most Patrols & Adventures etc.) That Faction and all of the members in that faction that got the most points then gets a special reward.