Actually, the fix would be pretty easy. Why not make faction currencies? It's always bothered me that while doing patrol missions, you would do the mission for FWC, but if you were wearing Dead Orbit class item, your rep gain would go to Dead Orbit and you got nothing from FWC. Why not get the rep from Dead Orbit for representing them, but get PAID by the faction putting out the bounty? This would give PVE'rs a non-pvp way to earn faction marks while still maintaining the integrity of the vanguard system by splitting the marks earned up between the factions...because if they were rewarded crucible marks, it would be easier to just allow vanguard marks to be usable to purchase faction gear and I don't believe Bungie wants to go that route. So, to summarize, patrol missions would reward rep to whichever faction you represent, but pay you with faction marks from whichever faction issued the bounty/mission request. The faction vendors would accept either crucible or their own faction marks as payment for their gear.