All we need to do is modify files in db/units/division folders by adding something like this
of course for each unit type we have to modify time and upgrade cost factors ( since we are not using same unit types as in classic DH ).
upgrade = { type = garrison upgrade_time_factor = 0.40 upgrade_cost_factor = 0.48 }
upgrade = { type = bergsjaeger upgrade_time_factor = 0.62 upgrade_cost_factor = 1.29 }
upgrade = { type = paratrooper upgrade_time_factor = 0.62 upgrade_cost_factor = 1.97 }
upgrade = { type = marine upgrade_time_factor = 0.62 upgrade_cost_factor = 1.85 }
upgrade = { type = cavalry upgrade_time_factor = 0.9 upgrade_cost_factor = 0.65 }
upgrade = { type = motorized upgrade_time_factor = 0.65 upgrade_cost_factor = 1.72 }
upgrade = { type = mechanized upgrade_time_factor = 1 upgrade_cost_factor = 1.57 }
What do you think about this ?