I like turrets because they have a high rate of fire, and they are the simplest energy saving, it's like a simple knife for a chef
I would like to add unusual and unique weapons or modules related to science fiction literature, for example, "Dyson Sphere" according to the scientist's theory, this is a large artificial celestial body that creates a volumetric work of accumulating star energy, or you can diversify the interaction of biological weapons / crafting / mining / hunting , for example, you can create rockets of the swarm type, they pursue a target for a long time and cause minor damage, but also block fire at you, and in order to make such rockets you need to hunt certain life forms, and after mining you can turn it over to scientists or reduce them from them unique or decent shells / modules.