As idea - add new ores as Gold, for rocket control units and blue circuits, so high tier items need rare resources , and some lead maybe for ammo and military science? Also i would like to see some plutonium ore with enrichment reciepe for this mod https://mods.factorio.com/mod/PlutoniumEnergy . Also some of ores can be optional in launch settings :)
P.S. Added gold and plutonium for private use atm, and seems fine, maybe thats a good idea, so ive decided to ask here.