Really weak unit spawn on hard

[WhYdOyOuThInKtHaThApPeNeD]

Playing on hard and unit spawns are providing very tiny number of units. Literally 90% of all good lvl.3 and especially lvl.4 units are provided in very tiny numbers. Basically no better than if they weren't there at all. A frustrating teez.
I've got a choice of just a few unit types to play through with so far. Have got to Verona, Montero, Tekron, Umkas so far. Hope it gets better.

Is this part of the planned design for harder difficulty settings?