not being able to hold so many cities as an reason to claim that early units are not so powerfull is not valid to me.
Organized trait plus a correct use of religion and finances and wood choped courthouses makes conquering the world with praetorians something easy plus having to low your science to 20% but winning a domination game is also a win. 20% science of 4 times the number of cities is 70-80 %
Name not the possibility of having all the conquered cities with one or two merchants [reduces the conquered city growth but compensates the economic loss] with caste system. Having this kind of conquered cities can become even at a proffit.
I'd also say that in multiplayer most valuable Special Units are the earlier ones (x-rush)
Organized trait plus a correct use of religion and finances and wood choped courthouses makes conquering the world with praetorians something easy plus having to low your science to 20% but winning a domination game is also a win. 20% science of 4 times the number of cities is 70-80 %
Name not the possibility of having all the conquered cities with one or two merchants [reduces the conquered city growth but compensates the economic loss] with caste system. Having this kind of conquered cities can become even at a proffit.
I'd also say that in multiplayer most valuable Special Units are the earlier ones (x-rush)