The game has only three faction units per group but doesn't have any more than this for the overwhelmingly possible world for the entire game to be remodeled around new units. For instance; the Vaulters only have the Marines, Dawn Officers, and then the Mech. That's it for their faction units.


For every group in the game, you only have three units of one or more category and that doesn't really help with some issues such as the Settler having been universal until you find the one group that doesn't. leading to the problem of how to take advantage of the economy with military production being imbued with this new concept.