Vanilla Starsector - you are correct about progression. Modiverse - hit Kaysaar with his Ashes of the Domain. It is specifically meant to enrich this particular side of game, and he made the stuff modular and compatible for others to integrate, Few do though... But it may be perfect for your mod in terms of potential. Industries, items, rare stuff and unique researchers, full fledged tech tree, colony mechanics, a working event system... Many things. DM him via Discord or even PM on forum. Plus, if he is up to the idea, feel free to DM me via Discord as well - I may help you with getting grips on what mod already presents (outside of coding, not my alley unfortinately) while not taking too much of Kaysaar's time (I was helping with AotD in terms of "pipelining" stuff during VOK 1.0 + actively tested early versions back in the day\use it so I do know what to expect of it after the full year)