I've just played through the (rather short) campaign. Interesting enough premise, but the presentation of it's story and characters is rather bland. The gameplay easily makes up for it though, with a clever AI pulling out plenty of surprises. The campaign does not seem too heavily scripted either - so no unfair spawns of enemy armies. Meta-units are an interesting addition too, with units behaving mostly intelligently within them. The dreadnaughts were also a blast to play with.
This game compares very favourably to other recent RTSs such as Grey Goo, Act of Aggression and Homeworld: Deserts of Kharak.