With the release of Starbound 1.0, I am not¹ upset but neither impressed with the game. As I had kind of expected, the writing is a little poor, but they were trying to find a mechanical premise for advancement that fit into the game, and that is hard. So instead of rambling on about their past choices, here is a sequel concept.
1. Game theme: Colonization, Industrialization, BBEGs, and Intergalactic Politics