I cannot praise the artwork in these games enough. That said I'd like to suggest a small cosmetic touch. Currently theres four levels for settlements, each with generic artwork. It would be really nice if instead of generic artwork for each settlement level, each major faction had its own artwork, to really showcase the architecture of each of the factions. 


I understand this doesn't add much gameplay wise, but it would just be a really nice touch, and drill home the idea that you are building settlements from your faction on each of your planets etc