I like the base troop types that each race has, however, I though it would be better if they were initially designed with the upgradeable equipment, so they stay relevent after you have upped your tech.
I obviously don't mean make every slot an upgradeable item, for example, the militia should only have one or two items of armour (using the upgradeable version). However, the najaborn should probably have more (full set even). Both examples were taken from the Umber's base unit designs.