PES, good point about bogging a system down, I was still thinking about hundreds of units... oops!
As for balance, a modder would have to work out what scale he wants for his mod. Is an army 50kt or 100kt or some other number? How many armies does he want a ship to be able to carry? Why can a ship that carries x number of armies carry millions of people (pop) but only one weapons platform?
Those are just some off-the-wall examples, of course.
Working out the cargo equivalences and the amount of damage different types of units can do to each other could be a bit of a headache but it can certainly be done.
That's all I meant.
