PvE players get access to: Vanguard armor and weapons. Crucible players get access to: Crucible armor and weapons, FWC armor and weapons, Dead Orbit armor and weapons, New Monarchy armor and weapons,. I don't see why PvP players deserve 3 additional vendors. If the factions also accept vanguard marks then both PvE players and PvP players still hold onto their exclusive gear (vanguard and crucible gear) while also offering more options and diversity to all players.