I know im new and maybe this is complete bs, but there are just all these ideas popping into my head and I’ll have to release them somehow. So, i have three suggestions, of which two are quite big and have synergy to each other and the third is
a cheap carrier(5$) with a very small shiplimit(maybe five or ten ships) for taking neutral stars. Probably these carriers would alwas retreat when meeting enemies, loosing some ships eventually and being destroyed when shipcount=zero like every carrier. Why? 1. For scouting enemy planets that are in hyperspace but out of sensor range and 2. for cheap early capturing of neutral planets without provoking the AI if it is faster at the planet.
Miniaturization (counterpart to terraforming): - in a basic way this already exists for there is high-level stars. But what about a technology that diminuishes the cost-increase of higher level infrastructure? So that maybe cost goes up not by x * y with x being base price and y the structure level but instead i.e. x + x * ((y - 1)+0.02 * z) with z being that techs level. Why? To make tall empires possible, that focus on the most valuable stars buildig them up to the limits with banking+miniaturization.
Technology-Specialization: at the moment it looks to me as if the game encourages researching all techs to a first level before going to the next one, while under circumstances getting ahead in one or two extra-important techs. I think it could be interesting to let players make tough decisions. Im just unsure how that should work.