I may be grasping at straws here but it occurs to me that each faction ties in philosophically to one of the enemies in the game. Dead orbit resembles the fallen. The fallen used to worship the traveler and gained power from it just like we do, but it abandoned them when the darkness came. Like dead orbit, they chose to flee their home world to find a new place in the universe to survive. New monarchy is focusing on a more traditional political / military war. They want to create an army to defend the city. Of course, after your city is safe, you still have an army and the next logical step is to take that army and go conquer new territory with it. Reminds me an awful lot of the cabal. Future war cult is concerned with the coming war and preparing for it. A lot of lore surrounding fwc hints that they might be able to predict the future in some manner. We also know that the exo stranger is a time traveler, and could be linked in some way to the future war cult in the distant future, where that war is occurring. Sounds an awful lot like the vex mo.