I have played this game for a little while and I have noticed that after you get a lot of the advanced techs the systems with few planets cannot compete with the ones with six. I think that for an end-game tech there should be one that allows you to create an unsubstantial planet like a small rock, and you have to keep converting it until you have an asteroid belt that you can terraform into a good planet such as jungle or terran. I think this process should be long and expensive but provide a way for getting bonuses for having well developed systems.

Well where would you get that small rock planet in the first place? And the dev's are not one for adding asteroid terraforming :P. But why would you do that, systems aren't meant to compete, and you're supposed to choose what systems you want to colonize anyway. No 4X game ever had the adding of planets to systems because it isn't possible :P. It's following the laws of mass conservation, you can't make something from nothing.

This has already been proposed here: /#/endless-space/forum/28-game-design/thread/12896-suggestion-building-planets

This thread has been linked to the former and is moved to the archives.