Kind of new here but been around a long time on the discord and played like 2400 hours in game. as i understand it fractalite is the one responsible for progenitor lore and wants them to remain mysterious. I'd like to suggest that the progenitor lore gets fleshed out but that you learn more about them by exploring their ruins, would give some more reason to explore in game and I think they could be an extremely interesting faction to learn about that way. id be happy to draft up some progenitor lore for that purpose so long as fractilite is ok with this.
I think it would be best to focus on player factions for the galaxy. Have you considered one of your own?