Enable you to have some sort of a low tech option (from other mods like JunkTrains or Early3x3Electric Furnace, Nanobots) when playing full bobs/angels without being to OP. Those techs are usually locked behind angels green science or higher, or require some construction or electronic block that you can't craft early on, which kind of defeat the idea of the early mod. Also add some sort of firepower if you're playing with harder enemies and can't kill the bases.
Small changes concerning balance, gameplay, or graphics.