Beautiful cinematics, 4 different factions that besides their similaties there are key factors that make you think on how to play different. Interesting scientific references with the naming, the nerd inside me overjoyed when I heard the term "von neumann probe".
Sure their units are somehow similars within the same faction; however I do not think it is a bad thing, they follow a "style"; it is just that in the beginning is harder to recognize them. I would love to see more of the game and a campaign continuation.