Looking great
Very minor point but the rocket capacity is listed in the GUI as 1 ton. Ton is the imperial measurement (with several different possible values because yay imperial system). The metric measurement is a tonne (t). Also the "K" of kg should not be capitalised.

To me, the best model for the behaviour of the biters is as follows:
Queen (one per spawner or maybe the spawner itself) is a directing intelligence for the biters of a spawner. There may also be an intelligence directing each group of spawners (not sure if groups of spawners send out coordinated ...