If the OP is right, then maybe it has to do with population size. Maybe your troops will actually have to come from somewhere, not just made from thin air. That'd be really cool, as well as adding a lot of strategy. No longer can a city of 1,000 people churn out 10,000 chariots.
Also, it looks like making war more strategic will make the game more streched out, as in you're in the classical era for longer, and war take longer.
Also, it looks like making war more strategic will make the game more streched out, as in you're in the classical era for longer, and war take longer.