I have a suggestion or inquiry with the Kraxis. I didn't notice while playing against them, but I did when I played as the Kraxis. I think the Kraxis should a mixture of Kingdoms and Empire. I am not sure how to do this. Perhaps mix the tech research tree. My suggestion would be something like this.
Civilization (Kingdom)----build the buildings and structures of the Kingdoms
Conquest (Empire)----To exist with the other Fallen races they should progress their warfare the same way
Sorcery or Magic (either)----I think this one could go either way
Domination (Empire)----Kraxis aren't really into adventure as much as just taking things over
Diplomacy (Kingdom)----possible build treaties the same way as the men before them
It shows that they aren't truly a Fallen race and I think this would add an interesting mix and add a little more depth.