Players can, their called the official faction leaders and reps can. Dev's only follow what the faction leaders need and say. I can say like, the Kusari civil war? That was decided by all Kuasri leaders. The Omicron stuff? Decided by the leaders in the Omicrons. The devs have some say here and there, but mostly its up to the faction leaders. I have to say, I think its fair the official faction have more leway on the lore of the faction, because honestly, there would be so much crap that it would not be funny.
Dev's don't really have a say on the story line, they only listen to the official faction leaders. Honestly if you want a say, join an official faction, that's how most people get a say. Beyond that, all I can recommend is just to sit back and watch. This is why official factions exist, so players can't do stuff they can do as indies. An example would be like myself. I lead the Blood Dragons but I got a High Command of players who help me write the Blood Dragon lore. Then the players around the faction help it evolve. I normally speak with the Kusari leaders, Hubert and them about the upcoming civil war for Kusari which is underway needless to say.
These factions have worked hard on having a say, most the time the dev's only move in if its something major, like a full scale war like the Bretoina war with Gallia. The dev's have a good say but normally they talk with the faction leaders to see what to do next. I can say I've heard BAF leaders talking with GRN leaders on how to start events or even lore stuff. Its not the devs, its the faction leaders you should be talking to